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Finding the Fourth Proportional to 84,813.68, 127,220.52 and 28,654.04

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Solution

The fourth proportional to 84,813.68, 127,220.52 and 28,654.04 is: 42,981.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,813.68 : 127,220.52 = 28,654.04 : x
  2. Step 2: Convert to fraction form
    84,813.68/127,220.52 = 28,654.04/x
  3. Step 3: Cross multiply
    84,813.68x = 127,220.52 × 28,654.04
  4. Step 4: Simplify right side
    84,813.68x = 3,645,381,868.90
  5. Step 5: Solve for x
    x = 3,645,381,868.90/84,813.68
  6. Step 6: Final answer
    x = 42,981.06

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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.