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Finding the Fourth Proportional to 98,388.52, 135,775.04 and 55,367.85

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Solution

The fourth proportional to 98,388.52, 135,775.04 and 55,367.85 is: 76,407.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,388.52 : 135,775.04 = 55,367.85 : x
  2. Step 2: Convert to fraction form
    98,388.52/135,775.04 = 55,367.85/x
  3. Step 3: Cross multiply
    98,388.52x = 135,775.04 × 55,367.85
  4. Step 4: Simplify right side
    98,388.52x = 7,517,572,280.78
  5. Step 5: Solve for x
    x = 7,517,572,280.78/98,388.52
  6. Step 6: Final answer
    x = 76,407.00

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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.