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Finding the Fourth Proportional to 172,872.39, 238,510.95 and 100,260.57

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Solution

The fourth proportional to 172,872.39, 238,510.95 and 100,260.57 is: 138,328.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,872.39 : 238,510.95 = 100,260.57 : x
  2. Step 2: Convert to fraction form
    172,872.39/238,510.95 = 100,260.57/x
  3. Step 3: Cross multiply
    172,872.39x = 238,510.95 × 100,260.57
  4. Step 4: Simplify right side
    172,872.39x = 23,913,243,798.24
  5. Step 5: Solve for x
    x = 23,913,243,798.24/172,872.39
  6. Step 6: Final answer
    x = 138,328.88

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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.