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Finding the Fourth Proportional to 168,405.10, 232,393.21 and 100,387

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Solution

The fourth proportional to 168,405.10, 232,393.21 and 100,387 is: 138,530.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,405.10 : 232,393.21 = 100,387 : x
  2. Step 2: Convert to fraction form
    168,405.10/232,393.21 = 100,387/x
  3. Step 3: Cross multiply
    168,405.10x = 232,393.21 × 100,387
  4. Step 4: Simplify right side
    168,405.10x = 23,329,257,172.27
  5. Step 5: Solve for x
    x = 23,329,257,172.27/168,405.10
  6. Step 6: Final answer
    x = 138,530.59

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1.5x scale

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.