Home / 138,310.40-207,465.60-123,438.80

Finding the Fourth Proportional to 138,310.40, 207,465.60 and 123,438.80

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Solution

The fourth proportional to 138,310.40, 207,465.60 and 123,438.80 is: 185,158.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,310.40 : 207,465.60 = 123,438.80 : x
  2. Step 2: Convert to fraction form
    138,310.40/207,465.60 = 123,438.80/x
  3. Step 3: Cross multiply
    138,310.40x = 207,465.60 × 123,438.80
  4. Step 4: Simplify right side
    138,310.40x = 25,609,304,705.28
  5. Step 5: Solve for x
    x = 25,609,304,705.28/138,310.40
  6. Step 6: Final answer
    x = 185,158.20

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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.