Home / 280,229,191.52-420,383,904-86,156,902.40

Finding the Fourth Proportional to 280,229,191.52, 420,383,904 and 86,156,902.40

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Solution

The fourth proportional to 280,229,191.52, 420,383,904 and 86,156,902.40 is: 129,247,687.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,229,191.52 : 420,383,904 = 86,156,902.40 : x
  2. Step 2: Convert to fraction form
    280,229,191.52/420,383,904 = 86,156,902.40/x
  3. Step 3: Cross multiply
    280,229,191.52x = 420,383,904 × 86,156,902.40
  4. Step 4: Simplify right side
    280,229,191.52x = 36,218,974,987,458,976
  5. Step 5: Solve for x
    x = 36,218,974,987,458,976/280,229,191.52
  6. Step 6: Final answer
    x = 129,247,687.55

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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.