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Finding the Fourth Proportional to 91,329.78, 136,939.92 and 37,957.38

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Solution

The fourth proportional to 91,329.78, 136,939.92 and 37,957.38 is: 56,913.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,329.78 : 136,939.92 = 37,957.38 : x
  2. Step 2: Convert to fraction form
    91,329.78/136,939.92 = 37,957.38/x
  3. Step 3: Cross multiply
    91,329.78x = 136,939.92 × 37,957.38
  4. Step 4: Simplify right side
    91,329.78x = 5,197,880,580.61
  5. Step 5: Solve for x
    x = 5,197,880,580.61/91,329.78
  6. Step 6: Final answer
    x = 56,913.32

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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.