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Finding the Fourth Proportional to 91,965.29, 137,957.65 and 39,360.65

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Solution

The fourth proportional to 91,965.29, 137,957.65 and 39,360.65 is: 59,045.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,965.29 : 137,957.65 = 39,360.65 : x
  2. Step 2: Convert to fraction form
    91,965.29/137,957.65 = 39,360.65/x
  3. Step 3: Cross multiply
    91,965.29x = 137,957.65 × 39,360.65
  4. Step 4: Simplify right side
    91,965.29x = 5,430,101,988.28
  5. Step 5: Solve for x
    x = 5,430,101,988.28/91,965.29
  6. Step 6: Final answer
    x = 59,045.13

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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.