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Finding the Fourth Proportional to 91,187.52, 136,730.16 and 31,999.92

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Solution

The fourth proportional to 91,187.52, 136,730.16 and 31,999.92 is: 47,981.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,187.52 : 136,730.16 = 31,999.92 : x
  2. Step 2: Convert to fraction form
    91,187.52/136,730.16 = 31,999.92/x
  3. Step 3: Cross multiply
    91,187.52x = 136,730.16 × 31,999.92
  4. Step 4: Simplify right side
    91,187.52x = 4,375,354,181.59
  5. Step 5: Solve for x
    x = 4,375,354,181.59/91,187.52
  6. Step 6: Final answer
    x = 47,981.94

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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.