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Finding the Fourth Proportional to 83,491.80, 125,237.70 and 21,162.30

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Solution

The fourth proportional to 83,491.80, 125,237.70 and 21,162.30 is: 31,743.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,491.80 : 125,237.70 = 21,162.30 : x
  2. Step 2: Convert to fraction form
    83,491.80/125,237.70 = 21,162.30/x
  3. Step 3: Cross multiply
    83,491.80x = 125,237.70 × 21,162.30
  4. Step 4: Simplify right side
    83,491.80x = 2,650,317,778.71
  5. Step 5: Solve for x
    x = 2,650,317,778.71/83,491.80
  6. Step 6: Final answer
    x = 31,743.45

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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.