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Finding the Fourth Proportional to 124,379.87, 171,668.72 and 86,632.25

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Solution

The fourth proportional to 124,379.87, 171,668.72 and 86,632.25 is: 119,569.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,379.87 : 171,668.72 = 86,632.25 : x
  2. Step 2: Convert to fraction form
    124,379.87/171,668.72 = 86,632.25/x
  3. Step 3: Cross multiply
    124,379.87x = 171,668.72 × 86,632.25
  4. Step 4: Simplify right side
    124,379.87x = 14,872,047,035.06
  5. Step 5: Solve for x
    x = 14,872,047,035.06/124,379.87
  6. Step 6: Final answer
    x = 119,569.57

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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.