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Finding the Fourth Proportional to 83,437.70, 125,155.40 and 20,258.30

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Solution

The fourth proportional to 83,437.70, 125,155.40 and 20,258.30 is: 30,387.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,437.70 : 125,155.40 = 20,258.30 : x
  2. Step 2: Convert to fraction form
    83,437.70/125,155.40 = 20,258.30/x
  3. Step 3: Cross multiply
    83,437.70x = 125,155.40 × 20,258.30
  4. Step 4: Simplify right side
    83,437.70x = 2,535,435,851.42
  5. Step 5: Solve for x
    x = 2,535,435,851.42/83,437.70
  6. Step 6: Final answer
    x = 30,387.18

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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.