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Finding the Fourth Proportional to 101,649.92, 140,154.88 and 87,478.40

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Solution

The fourth proportional to 101,649.92, 140,154.88 and 87,478.40 is: 120,615.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,649.92 : 140,154.88 = 87,478.40 : x
  2. Step 2: Convert to fraction form
    101,649.92/140,154.88 = 87,478.40/x
  3. Step 3: Cross multiply
    101,649.92x = 140,154.88 × 87,478.40
  4. Step 4: Simplify right side
    101,649.92x = 12,260,524,654.59
  5. Step 5: Solve for x
    x = 12,260,524,654.59/101,649.92
  6. Step 6: Final answer
    x = 120,615.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.