Home / 138,763.12-207,140.60-121,948.42

Finding the Fourth Proportional to 138,763.12, 207,140.60 and 121,948.42

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Solution

The fourth proportional to 138,763.12, 207,140.60 and 121,948.42 is: 182,040.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,763.12 : 207,140.60 = 121,948.42 : x
  2. Step 2: Convert to fraction form
    138,763.12/207,140.60 = 121,948.42/x
  3. Step 3: Cross multiply
    138,763.12x = 207,140.60 × 121,948.42
  4. Step 4: Simplify right side
    138,763.12x = 25,260,468,887.85
  5. Step 5: Solve for x
    x = 25,260,468,887.85/138,763.12
  6. Step 6: Final answer
    x = 182,040.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.