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Finding the Fourth Proportional to 72,966.56, 108,724.43 and 65,007.90

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Solution

The fourth proportional to 72,966.56, 108,724.43 and 65,007.90 is: 96,865.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,966.56 : 108,724.43 = 65,007.90 : x
  2. Step 2: Convert to fraction form
    72,966.56/108,724.43 = 65,007.90/x
  3. Step 3: Cross multiply
    72,966.56x = 108,724.43 × 65,007.90
  4. Step 4: Simplify right side
    72,966.56x = 7,067,947,035.52
  5. Step 5: Solve for x
    x = 7,067,947,035.52/72,966.56
  6. Step 6: Final answer
    x = 96,865.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.