Home / 85,417.12-128,082.67-28,470.86

Finding the Fourth Proportional to 85,417.12, 128,082.67 and 28,470.86

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Solution

The fourth proportional to 85,417.12, 128,082.67 and 28,470.86 is: 42,691.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,417.12 : 128,082.67 = 28,470.86 : x
  2. Step 2: Convert to fraction form
    85,417.12/128,082.67 = 28,470.86/x
  3. Step 3: Cross multiply
    85,417.12x = 128,082.67 × 28,470.86
  4. Step 4: Simplify right side
    85,417.12x = 3,646,623,766.00
  5. Step 5: Solve for x
    x = 3,646,623,766.00/85,417.12
  6. Step 6: Final answer
    x = 42,691.95

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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.