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Finding the Fourth Proportional to 91,992.78, 137,988.90 and 25,432.74

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Solution

The fourth proportional to 91,992.78, 137,988.90 and 25,432.74 is: 38,149.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,992.78 : 137,988.90 = 25,432.74 : x
  2. Step 2: Convert to fraction form
    91,992.78/137,988.90 = 25,432.74/x
  3. Step 3: Cross multiply
    91,992.78x = 137,988.90 × 25,432.74
  4. Step 4: Simplify right side
    91,992.78x = 3,509,435,816.59
  5. Step 5: Solve for x
    x = 3,509,435,816.59/91,992.78
  6. Step 6: Final answer
    x = 38,149.04

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1.5x scale

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.