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Finding the Fourth Proportional to 503,743.80, 755,615.70 and 129,766.80

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Solution

The fourth proportional to 503,743.80, 755,615.70 and 129,766.80 is: 194,650.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,743.80 : 755,615.70 = 129,766.80 : x
  2. Step 2: Convert to fraction form
    503,743.80/755,615.70 = 129,766.80/x
  3. Step 3: Cross multiply
    503,743.80x = 755,615.70 × 129,766.80
  4. Step 4: Simplify right side
    503,743.80x = 98,053,831,418.76
  5. Step 5: Solve for x
    x = 98,053,831,418.76/503,743.80
  6. Step 6: Final answer
    x = 194,650.20

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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.