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Finding the Fourth Proportional to 91,996.80, 137,995.20 and 45,340.80

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Solution

The fourth proportional to 91,996.80, 137,995.20 and 45,340.80 is: 68,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,996.80 : 137,995.20 = 45,340.80 : x
  2. Step 2: Convert to fraction form
    91,996.80/137,995.20 = 45,340.80/x
  3. Step 3: Cross multiply
    91,996.80x = 137,995.20 × 45,340.80
  4. Step 4: Simplify right side
    91,996.80x = 6,256,812,764.16
  5. Step 5: Solve for x
    x = 6,256,812,764.16/91,996.80
  6. Step 6: Final answer
    x = 68,011.20

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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.