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Finding the Fourth Proportional to 221,666.10, 332,499.15 and 128,123.70

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Solution

The fourth proportional to 221,666.10, 332,499.15 and 128,123.70 is: 192,185.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,666.10 : 332,499.15 = 128,123.70 : x
  2. Step 2: Convert to fraction form
    221,666.10/332,499.15 = 128,123.70/x
  3. Step 3: Cross multiply
    221,666.10x = 332,499.15 × 128,123.70
  4. Step 4: Simplify right side
    221,666.10x = 42,601,021,344.86
  5. Step 5: Solve for x
    x = 42,601,021,344.86/221,666.10
  6. Step 6: Final answer
    x = 192,185.55

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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.