Home / 128,937.30-177,924.56-71,572.11

Finding the Fourth Proportional to 128,937.30, 177,924.56 and 71,572.11

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Solution

The fourth proportional to 128,937.30, 177,924.56 and 71,572.11 is: 98,764.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,937.30 : 177,924.56 = 71,572.11 : x
  2. Step 2: Convert to fraction form
    128,937.30/177,924.56 = 71,572.11/x
  3. Step 3: Cross multiply
    128,937.30x = 177,924.56 × 71,572.11
  4. Step 4: Simplify right side
    128,937.30x = 12,734,435,822.16
  5. Step 5: Solve for x
    x = 12,734,435,822.16/128,937.30
  6. Step 6: Final answer
    x = 98,764.56

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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.