Home / 74,135.14-102,306.31-40,143.66

Finding the Fourth Proportional to 74,135.14, 102,306.31 and 40,143.66

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Solution

The fourth proportional to 74,135.14, 102,306.31 and 40,143.66 is: 55,398.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,135.14 : 102,306.31 = 40,143.66 : x
  2. Step 2: Convert to fraction form
    74,135.14/102,306.31 = 40,143.66/x
  3. Step 3: Cross multiply
    74,135.14x = 102,306.31 × 40,143.66
  4. Step 4: Simplify right side
    74,135.14x = 4,106,949,724.49
  5. Step 5: Solve for x
    x = 4,106,949,724.49/74,135.14
  6. Step 6: Final answer
    x = 55,398.15

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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.