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Finding the Fourth Proportional to 155,885.80, 215,121.72 and 84,265.96

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Solution

The fourth proportional to 155,885.80, 215,121.72 and 84,265.96 is: 116,286.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,885.80 : 215,121.72 = 84,265.96 : x
  2. Step 2: Convert to fraction form
    155,885.80/215,121.72 = 84,265.96/x
  3. Step 3: Cross multiply
    155,885.80x = 215,121.72 × 84,265.96
  4. Step 4: Simplify right side
    155,885.80x = 18,127,438,252.65
  5. Step 5: Solve for x
    x = 18,127,438,252.65/155,885.80
  6. Step 6: Final answer
    x = 116,286.66

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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.