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Finding the Fourth Proportional to 139,550.40, 209,374.20 and 60,721.20

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Solution

The fourth proportional to 139,550.40, 209,374.20 and 60,721.20 is: 91,102.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,550.40 : 209,374.20 = 60,721.20 : x
  2. Step 2: Convert to fraction form
    139,550.40/209,374.20 = 60,721.20/x
  3. Step 3: Cross multiply
    139,550.40x = 209,374.20 × 60,721.20
  4. Step 4: Simplify right side
    139,550.40x = 12,713,452,673.04
  5. Step 5: Solve for x
    x = 12,713,452,673.04/139,550.40
  6. Step 6: Final answer
    x = 91,102.95

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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.