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Finding the Fourth Proportional to 218,663.55, 301,780.20 and 121,876.24

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Solution

The fourth proportional to 218,663.55, 301,780.20 and 121,876.24 is: 168,202.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,663.55 : 301,780.20 = 121,876.24 : x
  2. Step 2: Convert to fraction form
    218,663.55/301,780.20 = 121,876.24/x
  3. Step 3: Cross multiply
    218,663.55x = 301,780.20 × 121,876.24
  4. Step 4: Simplify right side
    218,663.55x = 36,779,835,502.11
  5. Step 5: Solve for x
    x = 36,779,835,502.11/218,663.55
  6. Step 6: Final answer
    x = 168,202.87

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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.