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Finding the Fourth Proportional to 72,819.95, 100,471.86 and 42,612.75

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Solution

The fourth proportional to 72,819.95, 100,471.86 and 42,612.75 is: 58,794.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,819.95 : 100,471.86 = 42,612.75 : x
  2. Step 2: Convert to fraction form
    72,819.95/100,471.86 = 42,612.75/x
  3. Step 3: Cross multiply
    72,819.95x = 100,471.86 × 42,612.75
  4. Step 4: Simplify right side
    72,819.95x = 4,281,382,252.22
  5. Step 5: Solve for x
    x = 4,281,382,252.22/72,819.95
  6. Step 6: Final answer
    x = 58,794.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.