Home / 78,639,281.49-117,958,820.16-21,131,553.94

Finding the Fourth Proportional to 78,639,281.49, 117,958,820.16 and 21,131,553.94

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Solution

The fourth proportional to 78,639,281.49, 117,958,820.16 and 21,131,553.94 is: 31,697,303.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639,281.49 : 117,958,820.16 = 21,131,553.94 : x
  2. Step 2: Convert to fraction form
    78,639,281.49/117,958,820.16 = 21,131,553.94/x
  3. Step 3: Cross multiply
    78,639,281.49x = 117,958,820.16 × 21,131,553.94
  4. Step 4: Simplify right side
    78,639,281.49x = 2,492,653,170,909,799.50
  5. Step 5: Solve for x
    x = 2,492,653,170,909,799.50/78,639,281.49
  6. Step 6: Final answer
    x = 31,697,303.48

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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.