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Finding the Fourth Proportional to 91,345.68, 136,925.70 and 61,766.88

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Solution

The fourth proportional to 91,345.68, 136,925.70 and 61,766.88 is: 92,587.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,345.68 : 136,925.70 = 61,766.88 : x
  2. Step 2: Convert to fraction form
    91,345.68/136,925.70 = 61,766.88/x
  3. Step 3: Cross multiply
    91,345.68x = 136,925.70 × 61,766.88
  4. Step 4: Simplify right side
    91,345.68x = 8,457,473,280.82
  5. Step 5: Solve for x
    x = 8,457,473,280.82/91,345.68
  6. Step 6: Final answer
    x = 92,587.56

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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.