Home / 78,286,492,995.78-117,381,680,992.88-30,423,616,539.69

Finding the Fourth Proportional to 78,286,492,995.78, 117,381,680,992.88 and 30,423,616,539.69

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Solution

The fourth proportional to 78,286,492,995.78, 117,381,680,992.88 and 30,423,616,539.69 is: 45,616,748,364.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,286,492,995.78 : 117,381,680,992.88 = 30,423,616,539.69 : x
  2. Step 2: Convert to fraction form
    78,286,492,995.78/117,381,680,992.88 = 30,423,616,539.69/x
  3. Step 3: Cross multiply
    78,286,492,995.78x = 117,381,680,992.88 × 30,423,616,539.69
  4. Step 4: Simplify right side
    78,286,492,995.78x = 3,571,175,251,311,599,288,320
  5. Step 5: Solve for x
    x = 3,571,175,251,311,599,288,320/78,286,492,995.78
  6. Step 6: Final answer
    x = 45,616,748,364.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.