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Finding the Fourth Proportional to 67,291.20, 100,512.72 and 65,424.96

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Solution

The fourth proportional to 67,291.20, 100,512.72 and 65,424.96 is: 97,725.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,291.20 : 100,512.72 = 65,424.96 : x
  2. Step 2: Convert to fraction form
    67,291.20/100,512.72 = 65,424.96/x
  3. Step 3: Cross multiply
    67,291.20x = 100,512.72 × 65,424.96
  4. Step 4: Simplify right side
    67,291.20x = 6,576,040,685.49
  5. Step 5: Solve for x
    x = 6,576,040,685.49/67,291.20
  6. Step 6: Final answer
    x = 97,725.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.