Home / 231,931.20-347,896.80-138,619.20

Finding the Fourth Proportional to 231,931.20, 347,896.80 and 138,619.20

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Solution

The fourth proportional to 231,931.20, 347,896.80 and 138,619.20 is: 207,928.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,931.20 : 347,896.80 = 138,619.20 : x
  2. Step 2: Convert to fraction form
    231,931.20/347,896.80 = 138,619.20/x
  3. Step 3: Cross multiply
    231,931.20x = 347,896.80 × 138,619.20
  4. Step 4: Simplify right side
    231,931.20x = 48,225,176,098.56
  5. Step 5: Solve for x
    x = 48,225,176,098.56/231,931.20
  6. Step 6: Final answer
    x = 207,928.80

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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.