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Finding the Fourth Proportional to 87,307.71, 130,802.97 and 67,349.31

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Solution

The fourth proportional to 87,307.71, 130,802.97 and 67,349.31 is: 100,901.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,307.71 : 130,802.97 = 67,349.31 : x
  2. Step 2: Convert to fraction form
    87,307.71/130,802.97 = 67,349.31/x
  3. Step 3: Cross multiply
    87,307.71x = 130,802.97 × 67,349.31
  4. Step 4: Simplify right side
    87,307.71x = 8,809,489,775.45
  5. Step 5: Solve for x
    x = 8,809,489,775.45/87,307.71
  6. Step 6: Final answer
    x = 100,901.62

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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.