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Finding the Fourth Proportional to 115,671, 172,534.18 and 105,040.56

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Solution

The fourth proportional to 115,671, 172,534.18 and 105,040.56 is: 156,677.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,671 : 172,534.18 = 105,040.56 : x
  2. Step 2: Convert to fraction form
    115,671/172,534.18 = 105,040.56/x
  3. Step 3: Cross multiply
    115,671x = 172,534.18 × 105,040.56
  4. Step 4: Simplify right side
    115,671x = 18,123,086,623.74
  5. Step 5: Solve for x
    x = 18,123,086,623.74/115,671
  6. Step 6: Final answer
    x = 156,677.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.