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Finding the Fourth Proportional to 218,311.65, 301,248.65 and 122,816.30

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Solution

The fourth proportional to 218,311.65, 301,248.65 and 122,816.30 is: 169,474.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,311.65 : 301,248.65 = 122,816.30 : x
  2. Step 2: Convert to fraction form
    218,311.65/301,248.65 = 122,816.30/x
  3. Step 3: Cross multiply
    218,311.65x = 301,248.65 × 122,816.30
  4. Step 4: Simplify right side
    218,311.65x = 36,998,243,373.79
  5. Step 5: Solve for x
    x = 36,998,243,373.79/218,311.65
  6. Step 6: Final answer
    x = 169,474.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.