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Finding the Fourth Proportional to 67,512.80, 101,269.20 and 54,390.80

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Solution

The fourth proportional to 67,512.80, 101,269.20 and 54,390.80 is: 81,586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,512.80 : 101,269.20 = 54,390.80 : x
  2. Step 2: Convert to fraction form
    67,512.80/101,269.20 = 54,390.80/x
  3. Step 3: Cross multiply
    67,512.80x = 101,269.20 × 54,390.80
  4. Step 4: Simplify right side
    67,512.80x = 5,508,112,803.36
  5. Step 5: Solve for x
    x = 5,508,112,803.36/67,512.80
  6. Step 6: Final answer
    x = 81,586.20

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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.