Home / 278,870,143.60-418,320,961.80-84,787,890.40

Finding the Fourth Proportional to 278,870,143.60, 418,320,961.80 and 84,787,890.40

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Solution

The fourth proportional to 278,870,143.60, 418,320,961.80 and 84,787,890.40 is: 127,186,623.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,870,143.60 : 418,320,961.80 = 84,787,890.40 : x
  2. Step 2: Convert to fraction form
    278,870,143.60/418,320,961.80 = 84,787,890.40/x
  3. Step 3: Cross multiply
    278,870,143.60x = 418,320,961.80 × 84,787,890.40
  4. Step 4: Simplify right side
    278,870,143.60x = 35,468,551,861,120,992
  5. Step 5: Solve for x
    x = 35,468,551,861,120,992/278,870,143.60
  6. Step 6: Final answer
    x = 127,186,623.15

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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.