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Finding the Fourth Proportional to 231,998.80, 347,998.20 and 121,176.40

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Solution

The fourth proportional to 231,998.80, 347,998.20 and 121,176.40 is: 181,764.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,998.80 : 347,998.20 = 121,176.40 : x
  2. Step 2: Convert to fraction form
    231,998.80/347,998.20 = 121,176.40/x
  3. Step 3: Cross multiply
    231,998.80x = 347,998.20 × 121,176.40
  4. Step 4: Simplify right side
    231,998.80x = 42,169,169,082.48
  5. Step 5: Solve for x
    x = 42,169,169,082.48/231,998.80
  6. Step 6: Final answer
    x = 181,764.60

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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.