Home / 285,976,751.40-428,965,127.10-81,478,254.60

Finding the Fourth Proportional to 285,976,751.40, 428,965,127.10 and 81,478,254.60

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Solution

The fourth proportional to 285,976,751.40, 428,965,127.10 and 81,478,254.60 is: 122,217,381.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,976,751.40 : 428,965,127.10 = 81,478,254.60 : x
  2. Step 2: Convert to fraction form
    285,976,751.40/428,965,127.10 = 81,478,254.60/x
  3. Step 3: Cross multiply
    285,976,751.40x = 428,965,127.10 × 81,478,254.60
  4. Step 4: Simplify right side
    285,976,751.40x = 34,951,329,840,375,160
  5. Step 5: Solve for x
    x = 34,951,329,840,375,160/285,976,751.40
  6. Step 6: Final answer
    x = 122,217,381.90

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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.