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Finding the Fourth Proportional to 124,575.80, 186,426.30 and 85,209.80

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Solution

The fourth proportional to 124,575.80, 186,426.30 and 85,209.80 is: 127,515.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,575.80 : 186,426.30 = 85,209.80 : x
  2. Step 2: Convert to fraction form
    124,575.80/186,426.30 = 85,209.80/x
  3. Step 3: Cross multiply
    124,575.80x = 186,426.30 × 85,209.80
  4. Step 4: Simplify right side
    124,575.80x = 15,885,347,737.74
  5. Step 5: Solve for x
    x = 15,885,347,737.74/124,575.80
  6. Step 6: Final answer
    x = 127,515.52

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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.