Home / 138,821.80-208,211.10-38,972.20

Finding the Fourth Proportional to 138,821.80, 208,211.10 and 38,972.20

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Solution

The fourth proportional to 138,821.80, 208,211.10 and 38,972.20 is: 58,452.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,821.80 : 208,211.10 = 38,972.20 : x
  2. Step 2: Convert to fraction form
    138,821.80/208,211.10 = 38,972.20/x
  3. Step 3: Cross multiply
    138,821.80x = 208,211.10 × 38,972.20
  4. Step 4: Simplify right side
    138,821.80x = 8,114,444,631.42
  5. Step 5: Solve for x
    x = 8,114,444,631.42/138,821.80
  6. Step 6: Final answer
    x = 58,452.24

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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.