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Finding the Fourth Proportional to 91,342.92, 136,931.34 and 35,147.19

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Solution

The fourth proportional to 91,342.92, 136,931.34 and 35,147.19 is: 52,688.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,342.92 : 136,931.34 = 35,147.19 : x
  2. Step 2: Convert to fraction form
    91,342.92/136,931.34 = 35,147.19/x
  3. Step 3: Cross multiply
    91,342.92x = 136,931.34 × 35,147.19
  4. Step 4: Simplify right side
    91,342.92x = 4,812,751,823.93
  5. Step 5: Solve for x
    x = 4,812,751,823.93/91,342.92
  6. Step 6: Final answer
    x = 52,688.83

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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.