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Finding the Fourth Proportional to 125,039.88, 172,555.50 and 68,456.52

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Solution

The fourth proportional to 125,039.88, 172,555.50 and 68,456.52 is: 94,470.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,039.88 : 172,555.50 = 68,456.52 : x
  2. Step 2: Convert to fraction form
    125,039.88/172,555.50 = 68,456.52/x
  3. Step 3: Cross multiply
    125,039.88x = 172,555.50 × 68,456.52
  4. Step 4: Simplify right side
    125,039.88x = 11,812,549,036.86
  5. Step 5: Solve for x
    x = 11,812,549,036.86/125,039.88
  6. Step 6: Final answer
    x = 94,470.25

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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.