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Finding the Fourth Proportional to 83,283.80, 124,779.90 and 68,412.20

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Solution

The fourth proportional to 83,283.80, 124,779.90 and 68,412.20 is: 102,498.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,283.80 : 124,779.90 = 68,412.20 : x
  2. Step 2: Convert to fraction form
    83,283.80/124,779.90 = 68,412.20/x
  3. Step 3: Cross multiply
    83,283.80x = 124,779.90 × 68,412.20
  4. Step 4: Simplify right side
    83,283.80x = 8,536,467,474.78
  5. Step 5: Solve for x
    x = 8,536,467,474.78/83,283.80
  6. Step 6: Final answer
    x = 102,498.53

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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.