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Finding the Fourth Proportional to 91,178.70, 136,800.45 and 44,400.30

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Solution

The fourth proportional to 91,178.70, 136,800.45 and 44,400.30 is: 66,616.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,178.70 : 136,800.45 = 44,400.30 : x
  2. Step 2: Convert to fraction form
    91,178.70/136,800.45 = 44,400.30/x
  3. Step 3: Cross multiply
    91,178.70x = 136,800.45 × 44,400.30
  4. Step 4: Simplify right side
    91,178.70x = 6,073,981,020.14
  5. Step 5: Solve for x
    x = 6,073,981,020.14/91,178.70
  6. Step 6: Final answer
    x = 66,616.23

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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.