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Finding the Fourth Proportional to 81,124.80, 121,687.20 and 58,833.60

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Solution

The fourth proportional to 81,124.80, 121,687.20 and 58,833.60 is: 88,250.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,124.80 : 121,687.20 = 58,833.60 : x
  2. Step 2: Convert to fraction form
    81,124.80/121,687.20 = 58,833.60/x
  3. Step 3: Cross multiply
    81,124.80x = 121,687.20 × 58,833.60
  4. Step 4: Simplify right side
    81,124.80x = 7,159,296,049.92
  5. Step 5: Solve for x
    x = 7,159,296,049.92/81,124.80
  6. Step 6: Final answer
    x = 88,250.40

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1.5x scale

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.