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Finding the Fourth Proportional to 157,737.72, 217,678.38 and 86,117.76

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Solution

The fourth proportional to 157,737.72, 217,678.38 and 86,117.76 is: 118,842.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,737.72 : 217,678.38 = 86,117.76 : x
  2. Step 2: Convert to fraction form
    157,737.72/217,678.38 = 86,117.76/x
  3. Step 3: Cross multiply
    157,737.72x = 217,678.38 × 86,117.76
  4. Step 4: Simplify right side
    157,737.72x = 18,745,974,486.03
  5. Step 5: Solve for x
    x = 18,745,974,486.03/157,737.72
  6. Step 6: Final answer
    x = 118,842.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.