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Finding the Fourth Proportional to 82,290.80, 123,493.80 and 52,780.40

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Solution

The fourth proportional to 82,290.80, 123,493.80 and 52,780.40 is: 79,207.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,290.80 : 123,493.80 = 52,780.40 : x
  2. Step 2: Convert to fraction form
    82,290.80/123,493.80 = 52,780.40/x
  3. Step 3: Cross multiply
    82,290.80x = 123,493.80 × 52,780.40
  4. Step 4: Simplify right side
    82,290.80x = 6,518,052,161.52
  5. Step 5: Solve for x
    x = 6,518,052,161.52/82,290.80
  6. Step 6: Final answer
    x = 79,207.54

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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.