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Finding the Fourth Proportional to 143,294.80, 214,942.20 and 128,532.55

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Solution

The fourth proportional to 143,294.80, 214,942.20 and 128,532.55 is: 192,798.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,294.80 : 214,942.20 = 128,532.55 : x
  2. Step 2: Convert to fraction form
    143,294.80/214,942.20 = 128,532.55/x
  3. Step 3: Cross multiply
    143,294.80x = 214,942.20 × 128,532.55
  4. Step 4: Simplify right side
    143,294.80x = 27,627,069,068.61
  5. Step 5: Solve for x
    x = 27,627,069,068.61/143,294.80
  6. Step 6: Final answer
    x = 192,798.83

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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.