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Finding the Fourth Proportional to 125,130.40, 172,680.78 and 67,769.78

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Solution

The fourth proportional to 125,130.40, 172,680.78 and 67,769.78 is: 93,522.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,130.40 : 172,680.78 = 67,769.78 : x
  2. Step 2: Convert to fraction form
    125,130.40/172,680.78 = 67,769.78/x
  3. Step 3: Cross multiply
    125,130.40x = 172,680.78 × 67,769.78
  4. Step 4: Simplify right side
    125,130.40x = 11,702,538,470.83
  5. Step 5: Solve for x
    x = 11,702,538,470.83/125,130.40
  6. Step 6: Final answer
    x = 93,522.74

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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.