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Finding the Fourth Proportional to 214,722.60, 322,139.58 and 81,605.16

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Solution

The fourth proportional to 214,722.60, 322,139.58 and 81,605.16 is: 122,428.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,722.60 : 322,139.58 = 81,605.16 : x
  2. Step 2: Convert to fraction form
    214,722.60/322,139.58 = 81,605.16/x
  3. Step 3: Cross multiply
    214,722.60x = 322,139.58 × 81,605.16
  4. Step 4: Simplify right side
    214,722.60x = 26,288,251,968.23
  5. Step 5: Solve for x
    x = 26,288,251,968.23/214,722.60
  6. Step 6: Final answer
    x = 122,428.90

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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.