Home / 315,747.60-435,718.08-172,500.72

Finding the Fourth Proportional to 315,747.60, 435,718.08 and 172,500.72

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Solution

The fourth proportional to 315,747.60, 435,718.08 and 172,500.72 is: 238,043.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,747.60 : 435,718.08 = 172,500.72 : x
  2. Step 2: Convert to fraction form
    315,747.60/435,718.08 = 172,500.72/x
  3. Step 3: Cross multiply
    315,747.60x = 435,718.08 × 172,500.72
  4. Step 4: Simplify right side
    315,747.60x = 75,161,682,517.02
  5. Step 5: Solve for x
    x = 75,161,682,517.02/315,747.60
  6. Step 6: Final answer
    x = 238,043.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.