Home / 78,286,492,994.78-117,381,680,991.38-30,423,616,538.69

Finding the Fourth Proportional to 78,286,492,994.78, 117,381,680,991.38 and 30,423,616,538.69

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Solution

The fourth proportional to 78,286,492,994.78, 117,381,680,991.38 and 30,423,616,538.69 is: 45,616,748,362.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,286,492,994.78 : 117,381,680,991.38 = 30,423,616,538.69 : x
  2. Step 2: Convert to fraction form
    78,286,492,994.78/117,381,680,991.38 = 30,423,616,538.69/x
  3. Step 3: Cross multiply
    78,286,492,994.78x = 117,381,680,991.38 × 30,423,616,538.69
  4. Step 4: Simplify right side
    78,286,492,994.78x = 3,571,175,251,148,230,098,944
  5. Step 5: Solve for x
    x = 3,571,175,251,148,230,098,944/78,286,492,994.78
  6. Step 6: Final answer
    x = 45,616,748,362.79

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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.