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Finding the Fourth Proportional to 139,970.88, 209,913.26 and 40,104.32

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Solution

The fourth proportional to 139,970.88, 209,913.26 and 40,104.32 is: 60,144.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,970.88 : 209,913.26 = 40,104.32 : x
  2. Step 2: Convert to fraction form
    139,970.88/209,913.26 = 40,104.32/x
  3. Step 3: Cross multiply
    139,970.88x = 209,913.26 × 40,104.32
  4. Step 4: Simplify right side
    139,970.88x = 8,418,427,301.20
  5. Step 5: Solve for x
    x = 8,418,427,301.20/139,970.88
  6. Step 6: Final answer
    x = 60,144.13

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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.