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Finding the Fourth Proportional to 125,057.76, 172,563.45 and 71,339.57

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Solution

The fourth proportional to 125,057.76, 172,563.45 and 71,339.57 is: 98,439.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,057.76 : 172,563.45 = 71,339.57 : x
  2. Step 2: Convert to fraction form
    125,057.76/172,563.45 = 71,339.57/x
  3. Step 3: Cross multiply
    125,057.76x = 172,563.45 × 71,339.57
  4. Step 4: Simplify right side
    125,057.76x = 12,310,601,837.49
  5. Step 5: Solve for x
    x = 12,310,601,837.49/125,057.76
  6. Step 6: Final answer
    x = 98,439.33

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1.5x scale

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.