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Finding the Fourth Proportional to 72,904.57, 99,952.15 and 71,575.97

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Solution

The fourth proportional to 72,904.57, 99,952.15 and 71,575.97 is: 98,130.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,904.57 : 99,952.15 = 71,575.97 : x
  2. Step 2: Convert to fraction form
    72,904.57/99,952.15 = 71,575.97/x
  3. Step 3: Cross multiply
    72,904.57x = 99,952.15 × 71,575.97
  4. Step 4: Simplify right side
    72,904.57x = 7,154,171,545.34
  5. Step 5: Solve for x
    x = 7,154,171,545.34/72,904.57
  6. Step 6: Final answer
    x = 98,130.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.