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Finding the Fourth Proportional to 84,806.13, 127,223.86 and 28,646.65

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Solution

The fourth proportional to 84,806.13, 127,223.86 and 28,646.65 is: 42,974.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,806.13 : 127,223.86 = 28,646.65 : x
  2. Step 2: Convert to fraction form
    84,806.13/127,223.86 = 28,646.65/x
  3. Step 3: Cross multiply
    84,806.13x = 127,223.86 × 28,646.65
  4. Step 4: Simplify right side
    84,806.13x = 3,644,536,609.72
  5. Step 5: Solve for x
    x = 3,644,536,609.72/84,806.13
  6. Step 6: Final answer
    x = 42,974.92

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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.