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Finding the Fourth Proportional to 124,212.08, 171,613.08 and 86,654

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Solution

The fourth proportional to 124,212.08, 171,613.08 and 86,654 is: 119,722.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,212.08 : 171,613.08 = 86,654 : x
  2. Step 2: Convert to fraction form
    124,212.08/171,613.08 = 86,654/x
  3. Step 3: Cross multiply
    124,212.08x = 171,613.08 × 86,654
  4. Step 4: Simplify right side
    124,212.08x = 14,870,959,834.32
  5. Step 5: Solve for x
    x = 14,870,959,834.32/124,212.08
  6. Step 6: Final answer
    x = 119,722.33

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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.