Home / 138,129.20-207,193.80-49,385.60

Finding the Fourth Proportional to 138,129.20, 207,193.80 and 49,385.60

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Solution

The fourth proportional to 138,129.20, 207,193.80 and 49,385.60 is: 74,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,129.20 : 207,193.80 = 49,385.60 : x
  2. Step 2: Convert to fraction form
    138,129.20/207,193.80 = 49,385.60/x
  3. Step 3: Cross multiply
    138,129.20x = 207,193.80 × 49,385.60
  4. Step 4: Simplify right side
    138,129.20x = 10,232,390,129.28
  5. Step 5: Solve for x
    x = 10,232,390,129.28/138,129.20
  6. Step 6: Final answer
    x = 74,078.40

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1.5x scale

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.