Home / 280,482,456.79-420,768,894.12-86,393,781.71

Finding the Fourth Proportional to 280,482,456.79, 420,768,894.12 and 86,393,781.71

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Solution

The fourth proportional to 280,482,456.79, 420,768,894.12 and 86,393,781.71 is: 129,604,597.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,482,456.79 : 420,768,894.12 = 86,393,781.71 : x
  2. Step 2: Convert to fraction form
    280,482,456.79/420,768,894.12 = 86,393,781.71/x
  3. Step 3: Cross multiply
    280,482,456.79x = 420,768,894.12 × 86,393,781.71
  4. Step 4: Simplify right side
    280,482,456.79x = 36,351,815,988,961,384
  5. Step 5: Solve for x
    x = 36,351,815,988,961,384/280,482,456.79
  6. Step 6: Final answer
    x = 129,604,597.75

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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.