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Finding the Fourth Proportional to 124,572.68, 171,857.94 and 86,868.80

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Solution

The fourth proportional to 124,572.68, 171,857.94 and 86,868.80 is: 119,842.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,572.68 : 171,857.94 = 86,868.80 : x
  2. Step 2: Convert to fraction form
    124,572.68/171,857.94 = 86,868.80/x
  3. Step 3: Cross multiply
    124,572.68x = 171,857.94 × 86,868.80
  4. Step 4: Simplify right side
    124,572.68x = 14,929,093,018.27
  5. Step 5: Solve for x
    x = 14,929,093,018.27/124,572.68
  6. Step 6: Final answer
    x = 119,842.43

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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.