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Finding the Fourth Proportional to 85,756.88, 128,649.92 and 29,581.76

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Solution

The fourth proportional to 85,756.88, 128,649.92 and 29,581.76 is: 44,377.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,756.88 : 128,649.92 = 29,581.76 : x
  2. Step 2: Convert to fraction form
    85,756.88/128,649.92 = 29,581.76/x
  3. Step 3: Cross multiply
    85,756.88x = 128,649.92 × 29,581.76
  4. Step 4: Simplify right side
    85,756.88x = 3,805,691,057.46
  5. Step 5: Solve for x
    x = 3,805,691,057.46/85,756.88
  6. Step 6: Final answer
    x = 44,377.68

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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.