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Finding the Fourth Proportional to 315,753.55, 435,734.80 and 172,510.52

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Solution

The fourth proportional to 315,753.55, 435,734.80 and 172,510.52 is: 238,061.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,753.55 : 435,734.80 = 172,510.52 : x
  2. Step 2: Convert to fraction form
    315,753.55/435,734.80 = 172,510.52/x
  3. Step 3: Cross multiply
    315,753.55x = 435,734.80 × 172,510.52
  4. Step 4: Simplify right side
    315,753.55x = 75,168,836,930.10
  5. Step 5: Solve for x
    x = 75,168,836,930.10/315,753.55
  6. Step 6: Final answer
    x = 238,061.73

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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.