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Finding the Fourth Proportional to 260,084.80, 390,127.20 and 82,605.70

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Solution

The fourth proportional to 260,084.80, 390,127.20 and 82,605.70 is: 123,908.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,084.80 : 390,127.20 = 82,605.70 : x
  2. Step 2: Convert to fraction form
    260,084.80/390,127.20 = 82,605.70/x
  3. Step 3: Cross multiply
    260,084.80x = 390,127.20 × 82,605.70
  4. Step 4: Simplify right side
    260,084.80x = 32,226,730,445.04
  5. Step 5: Solve for x
    x = 32,226,730,445.04/260,084.80
  6. Step 6: Final answer
    x = 123,908.55

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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.