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Finding the Fourth Proportional to 81,023.73, 121,547.73 and 28,423.95

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Solution

The fourth proportional to 81,023.73, 121,547.73 and 28,423.95 is: 42,640.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,023.73 : 121,547.73 = 28,423.95 : x
  2. Step 2: Convert to fraction form
    81,023.73/121,547.73 = 28,423.95/x
  3. Step 3: Cross multiply
    81,023.73x = 121,547.73 × 28,423.95
  4. Step 4: Simplify right side
    81,023.73x = 3,454,866,600.13
  5. Step 5: Solve for x
    x = 3,454,866,600.13/81,023.73
  6. Step 6: Final answer
    x = 42,640.18

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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.