Home / 85,475.22-128,110.92-39,821.68

Finding the Fourth Proportional to 85,475.22, 128,110.92 and 39,821.68

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Solution

The fourth proportional to 85,475.22, 128,110.92 and 39,821.68 is: 59,685.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,475.22 : 128,110.92 = 39,821.68 : x
  2. Step 2: Convert to fraction form
    85,475.22/128,110.92 = 39,821.68/x
  3. Step 3: Cross multiply
    85,475.22x = 128,110.92 × 39,821.68
  4. Step 4: Simplify right side
    85,475.22x = 5,101,592,160.30
  5. Step 5: Solve for x
    x = 5,101,592,160.30/85,475.22
  6. Step 6: Final answer
    x = 59,685.04

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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.