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Finding the Fourth Proportional to 124,382.25, 171,672 and 86,634.63

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Solution

The fourth proportional to 124,382.25, 171,672 and 86,634.63 is: 119,572.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,382.25 : 171,672 = 86,634.63 : x
  2. Step 2: Convert to fraction form
    124,382.25/171,672 = 86,634.63/x
  3. Step 3: Cross multiply
    124,382.25x = 171,672 × 86,634.63
  4. Step 4: Simplify right side
    124,382.25x = 14,872,740,201.36
  5. Step 5: Solve for x
    x = 14,872,740,201.36/124,382.25
  6. Step 6: Final answer
    x = 119,572.85

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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.