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Finding the Fourth Proportional to 71,561.60, 107,428.80 and 71,043.20

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Solution

The fourth proportional to 71,561.60, 107,428.80 and 71,043.20 is: 106,650.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,561.60 : 107,428.80 = 71,043.20 : x
  2. Step 2: Convert to fraction form
    71,561.60/107,428.80 = 71,043.20/x
  3. Step 3: Cross multiply
    71,561.60x = 107,428.80 × 71,043.20
  4. Step 4: Simplify right side
    71,561.60x = 7,632,085,724.16
  5. Step 5: Solve for x
    x = 7,632,085,724.16/71,561.60
  6. Step 6: Final answer
    x = 106,650.57

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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.