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Finding the Fourth Proportional to 231,729.40, 347,812.80 and 143,155.90

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Solution

The fourth proportional to 231,729.40, 347,812.80 and 143,155.90 is: 214,868.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,729.40 : 347,812.80 = 143,155.90 : x
  2. Step 2: Convert to fraction form
    231,729.40/347,812.80 = 143,155.90/x
  3. Step 3: Cross multiply
    231,729.40x = 347,812.80 × 143,155.90
  4. Step 4: Simplify right side
    231,729.40x = 49,791,454,415.52
  5. Step 5: Solve for x
    x = 49,791,454,415.52/231,729.40
  6. Step 6: Final answer
    x = 214,868.96

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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.