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Finding the Fourth Proportional to 151,312.87, 208,805.02 and 86,735.80

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Solution

The fourth proportional to 151,312.87, 208,805.02 and 86,735.80 is: 119,691.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,312.87 : 208,805.02 = 86,735.80 : x
  2. Step 2: Convert to fraction form
    151,312.87/208,805.02 = 86,735.80/x
  3. Step 3: Cross multiply
    151,312.87x = 208,805.02 × 86,735.80
  4. Step 4: Simplify right side
    151,312.87x = 18,110,870,758.89
  5. Step 5: Solve for x
    x = 18,110,870,758.89/151,312.87
  6. Step 6: Final answer
    x = 119,691.54

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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.