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Finding the Fourth Proportional to 125,004.87, 172,500.08 and 68,405.31

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Solution

The fourth proportional to 125,004.87, 172,500.08 and 68,405.31 is: 94,395.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,004.87 : 172,500.08 = 68,405.31 : x
  2. Step 2: Convert to fraction form
    125,004.87/172,500.08 = 68,405.31/x
  3. Step 3: Cross multiply
    125,004.87x = 172,500.08 × 68,405.31
  4. Step 4: Simplify right side
    125,004.87x = 11,799,921,105.40
  5. Step 5: Solve for x
    x = 11,799,921,105.40/125,004.87
  6. Step 6: Final answer
    x = 94,395.69

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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.