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Finding the Fourth Proportional to 139,963.40, 209,881.92 and 40,100.74

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Solution

The fourth proportional to 139,963.40, 209,881.92 and 40,100.74 is: 60,133.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,963.40 : 209,881.92 = 40,100.74 : x
  2. Step 2: Convert to fraction form
    139,963.40/209,881.92 = 40,100.74/x
  3. Step 3: Cross multiply
    139,963.40x = 209,881.92 × 40,100.74
  4. Step 4: Simplify right side
    139,963.40x = 8,416,420,304.62
  5. Step 5: Solve for x
    x = 8,416,420,304.62/139,963.40
  6. Step 6: Final answer
    x = 60,133.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.