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Finding the Fourth Proportional to 218,722.55, 328,129.58 and 92,363.15

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Solution

The fourth proportional to 218,722.55, 328,129.58 and 92,363.15 is: 138,564.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,722.55 : 328,129.58 = 92,363.15 : x
  2. Step 2: Convert to fraction form
    218,722.55/328,129.58 = 92,363.15/x
  3. Step 3: Cross multiply
    218,722.55x = 328,129.58 × 92,363.15
  4. Step 4: Simplify right side
    218,722.55x = 30,307,082,668.21
  5. Step 5: Solve for x
    x = 30,307,082,668.21/218,722.55
  6. Step 6: Final answer
    x = 138,564.05

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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.