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Finding the Fourth Proportional to 218,614.32, 301,691.28 and 121,818.32

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Solution

The fourth proportional to 218,614.32, 301,691.28 and 121,818.32 is: 168,111.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,614.32 : 301,691.28 = 121,818.32 : x
  2. Step 2: Convert to fraction form
    218,614.32/301,691.28 = 121,818.32/x
  3. Step 3: Cross multiply
    218,614.32x = 301,691.28 × 121,818.32
  4. Step 4: Simplify right side
    218,614.32x = 36,751,524,888.25
  5. Step 5: Solve for x
    x = 36,751,524,888.25/218,614.32
  6. Step 6: Final answer
    x = 168,111.24

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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.