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Finding the Fourth Proportional to 72,812.40, 109,218.60 and 62,314.80

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Solution

The fourth proportional to 72,812.40, 109,218.60 and 62,314.80 is: 93,472.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,812.40 : 109,218.60 = 62,314.80 : x
  2. Step 2: Convert to fraction form
    72,812.40/109,218.60 = 62,314.80/x
  3. Step 3: Cross multiply
    72,812.40x = 109,218.60 × 62,314.80
  4. Step 4: Simplify right side
    72,812.40x = 6,805,935,215.28
  5. Step 5: Solve for x
    x = 6,805,935,215.28/72,812.40
  6. Step 6: Final answer
    x = 93,472.20

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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.