Home / 231,933.20-347,899.80-138,621.20

Finding the Fourth Proportional to 231,933.20, 347,899.80 and 138,621.20

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Solution

The fourth proportional to 231,933.20, 347,899.80 and 138,621.20 is: 207,931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,933.20 : 347,899.80 = 138,621.20 : x
  2. Step 2: Convert to fraction form
    231,933.20/347,899.80 = 138,621.20/x
  3. Step 3: Cross multiply
    231,933.20x = 347,899.80 × 138,621.20
  4. Step 4: Simplify right side
    231,933.20x = 48,226,287,755.76
  5. Step 5: Solve for x
    x = 48,226,287,755.76/231,933.20
  6. Step 6: Final answer
    x = 207,931.80

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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.