Home / 78,491,304-117,727,972.36-20,988,059.20

Finding the Fourth Proportional to 78,491,304, 117,727,972.36 and 20,988,059.20

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Solution

The fourth proportional to 78,491,304, 117,727,972.36 and 20,988,059.20 is: 31,479,686.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491,304 : 117,727,972.36 = 20,988,059.20 : x
  2. Step 2: Convert to fraction form
    78,491,304/117,727,972.36 = 20,988,059.20/x
  3. Step 3: Cross multiply
    78,491,304x = 117,727,972.36 × 20,988,059.20
  4. Step 4: Simplify right side
    78,491,304x = 2,470,881,653,040,854
  5. Step 5: Solve for x
    x = 2,470,881,653,040,854/78,491,304
  6. Step 6: Final answer
    x = 31,479,686.63

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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.