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Finding the Fourth Proportional to 91,630.80, 137,446.20 and 73,198.80

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Solution

The fourth proportional to 91,630.80, 137,446.20 and 73,198.80 is: 109,798.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,630.80 : 137,446.20 = 73,198.80 : x
  2. Step 2: Convert to fraction form
    91,630.80/137,446.20 = 73,198.80/x
  3. Step 3: Cross multiply
    91,630.80x = 137,446.20 × 73,198.80
  4. Step 4: Simplify right side
    91,630.80x = 10,060,896,904.56
  5. Step 5: Solve for x
    x = 10,060,896,904.56/91,630.80
  6. Step 6: Final answer
    x = 109,798.20

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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.