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Finding the Fourth Proportional to 74,719.76, 103,101.41 and 42,007.70

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Solution

The fourth proportional to 74,719.76, 103,101.41 and 42,007.70 is: 57,963.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,719.76 : 103,101.41 = 42,007.70 : x
  2. Step 2: Convert to fraction form
    74,719.76/103,101.41 = 42,007.70/x
  3. Step 3: Cross multiply
    74,719.76x = 103,101.41 × 42,007.70
  4. Step 4: Simplify right side
    74,719.76x = 4,331,052,375.31
  5. Step 5: Solve for x
    x = 4,331,052,375.31/74,719.76
  6. Step 6: Final answer
    x = 57,963.95

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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.