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Finding the Fourth Proportional to 139,999.70, 209,999.55 and 132,418.10

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Solution

The fourth proportional to 139,999.70, 209,999.55 and 132,418.10 is: 198,627.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,999.70 : 209,999.55 = 132,418.10 : x
  2. Step 2: Convert to fraction form
    139,999.70/209,999.55 = 132,418.10/x
  3. Step 3: Cross multiply
    139,999.70x = 209,999.55 × 132,418.10
  4. Step 4: Simplify right side
    139,999.70x = 27,807,741,411.86
  5. Step 5: Solve for x
    x = 27,807,741,411.86/139,999.70
  6. Step 6: Final answer
    x = 198,627.15

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1.5x scale

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.