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Finding the Fourth Proportional to 139,967.97, 209,988.15 and 40,135.47

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Solution

The fourth proportional to 139,967.97, 209,988.15 and 40,135.47 is: 60,213.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,967.97 : 209,988.15 = 40,135.47 : x
  2. Step 2: Convert to fraction form
    139,967.97/209,988.15 = 40,135.47/x
  3. Step 3: Cross multiply
    139,967.97x = 209,988.15 × 40,135.47
  4. Step 4: Simplify right side
    139,967.97x = 8,427,972,156.72
  5. Step 5: Solve for x
    x = 8,427,972,156.72/139,967.97
  6. Step 6: Final answer
    x = 60,213.58

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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.