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Finding the Fourth Proportional to 139,534.40, 209,350.20 and 60,705.20

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Solution

The fourth proportional to 139,534.40, 209,350.20 and 60,705.20 is: 91,078.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,534.40 : 209,350.20 = 60,705.20 : x
  2. Step 2: Convert to fraction form
    139,534.40/209,350.20 = 60,705.20/x
  3. Step 3: Cross multiply
    139,534.40x = 209,350.20 × 60,705.20
  4. Step 4: Simplify right side
    139,534.40x = 12,708,645,761.04
  5. Step 5: Solve for x
    x = 12,708,645,761.04/139,534.40
  6. Step 6: Final answer
    x = 91,078.94

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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.