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Finding the Fourth Proportional to 125,062.90, 172,586.90 and 67,702.05

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Solution

The fourth proportional to 125,062.90, 172,586.90 and 67,702.05 is: 93,428.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,062.90 : 172,586.90 = 67,702.05 : x
  2. Step 2: Convert to fraction form
    125,062.90/172,586.90 = 67,702.05/x
  3. Step 3: Cross multiply
    125,062.90x = 172,586.90 × 67,702.05
  4. Step 4: Simplify right side
    125,062.90x = 11,684,486,933.15
  5. Step 5: Solve for x
    x = 11,684,486,933.15/125,062.90
  6. Step 6: Final answer
    x = 93,428.88

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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.