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Finding the Fourth Proportional to 83,188.40, 124,782.49 and 20,008.49

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Solution

The fourth proportional to 83,188.40, 124,782.49 and 20,008.49 is: 30,012.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,188.40 : 124,782.49 = 20,008.49 : x
  2. Step 2: Convert to fraction form
    83,188.40/124,782.49 = 20,008.49/x
  3. Step 3: Cross multiply
    83,188.40x = 124,782.49 × 20,008.49
  4. Step 4: Simplify right side
    83,188.40x = 2,496,708,604.44
  5. Step 5: Solve for x
    x = 2,496,708,604.44/83,188.40
  6. Step 6: Final answer
    x = 30,012.70

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1.5x scale

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.