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Finding the Fourth Proportional to 83,329.70, 124,994.54 and 21,000.20

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Solution

The fourth proportional to 83,329.70, 124,994.54 and 21,000.20 is: 31,500.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,329.70 : 124,994.54 = 21,000.20 : x
  2. Step 2: Convert to fraction form
    83,329.70/124,994.54 = 21,000.20/x
  3. Step 3: Cross multiply
    83,329.70x = 124,994.54 × 21,000.20
  4. Step 4: Simplify right side
    83,329.70x = 2,624,909,608.93
  5. Step 5: Solve for x
    x = 2,624,909,608.93/83,329.70
  6. Step 6: Final answer
    x = 31,500.29

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Double scale
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Similar ratio
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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.