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Finding the Fourth Proportional to 257,877.75, 386,821.43 and 89,403.58

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Solution

The fourth proportional to 257,877.75, 386,821.43 and 89,403.58 is: 134,107.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,877.75 : 386,821.43 = 89,403.58 : x
  2. Step 2: Convert to fraction form
    257,877.75/386,821.43 = 89,403.58/x
  3. Step 3: Cross multiply
    257,877.75x = 386,821.43 × 89,403.58
  4. Step 4: Simplify right side
    257,877.75x = 34,583,221,034.49
  5. Step 5: Solve for x
    x = 34,583,221,034.49/257,877.75
  6. Step 6: Final answer
    x = 134,107.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.