Home / 138,829.60-207,952.80-76,427.20

Finding the Fourth Proportional to 138,829.60, 207,952.80 and 76,427.20

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Solution

The fourth proportional to 138,829.60, 207,952.80 and 76,427.20 is: 114,480.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,829.60 : 207,952.80 = 76,427.20 : x
  2. Step 2: Convert to fraction form
    138,829.60/207,952.80 = 76,427.20/x
  3. Step 3: Cross multiply
    138,829.60x = 207,952.80 × 76,427.20
  4. Step 4: Simplify right side
    138,829.60x = 15,893,250,236.16
  5. Step 5: Solve for x
    x = 15,893,250,236.16/138,829.60
  6. Step 6: Final answer
    x = 114,480.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.