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Finding the Fourth Proportional to 315,818.20, 435,810.54 and 172,549.72

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Solution

The fourth proportional to 315,818.20, 435,810.54 and 172,549.72 is: 238,108.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,818.20 : 435,810.54 = 172,549.72 : x
  2. Step 2: Convert to fraction form
    315,818.20/435,810.54 = 172,549.72/x
  3. Step 3: Cross multiply
    315,818.20x = 435,810.54 × 172,549.72
  4. Step 4: Simplify right side
    315,818.20x = 75,198,986,650.05
  5. Step 5: Solve for x
    x = 75,198,986,650.05/315,818.20
  6. Step 6: Final answer
    x = 238,108.46

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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.