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Finding the Fourth Proportional to 78,323.99, 108,143.27 and 48,149.76

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Solution

The fourth proportional to 78,323.99, 108,143.27 and 48,149.76 is: 66,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,323.99 : 108,143.27 = 48,149.76 : x
  2. Step 2: Convert to fraction form
    78,323.99/108,143.27 = 48,149.76/x
  3. Step 3: Cross multiply
    78,323.99x = 108,143.27 × 48,149.76
  4. Step 4: Simplify right side
    78,323.99x = 5,207,073,112.31
  5. Step 5: Solve for x
    x = 5,207,073,112.31/78,323.99
  6. Step 6: Final answer
    x = 66,481.20

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1.5x scale

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.