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Finding the Fourth Proportional to 214,446.40, 321,572.40 and 81,282.40

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Solution

The fourth proportional to 214,446.40, 321,572.40 and 81,282.40 is: 121,886.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,446.40 : 321,572.40 = 81,282.40 : x
  2. Step 2: Convert to fraction form
    214,446.40/321,572.40 = 81,282.40/x
  3. Step 3: Cross multiply
    214,446.40x = 321,572.40 × 81,282.40
  4. Step 4: Simplify right side
    214,446.40x = 26,138,176,445.76
  5. Step 5: Solve for x
    x = 26,138,176,445.76/214,446.40
  6. Step 6: Final answer
    x = 121,886.76

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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.