Home / 85,749.12-128,632.20-29,581.92

Finding the Fourth Proportional to 85,749.12, 128,632.20 and 29,581.92

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Solution

The fourth proportional to 85,749.12, 128,632.20 and 29,581.92 is: 44,375.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,749.12 : 128,632.20 = 29,581.92 : x
  2. Step 2: Convert to fraction form
    85,749.12/128,632.20 = 29,581.92/x
  3. Step 3: Cross multiply
    85,749.12x = 128,632.20 × 29,581.92
  4. Step 4: Simplify right side
    85,749.12x = 3,805,187,449.82
  5. Step 5: Solve for x
    x = 3,805,187,449.82/85,749.12
  6. Step 6: Final answer
    x = 44,375.82

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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.