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Finding the Fourth Proportional to 139,553.40, 209,378.70 and 60,724.20

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Solution

The fourth proportional to 139,553.40, 209,378.70 and 60,724.20 is: 91,107.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,553.40 : 209,378.70 = 60,724.20 : x
  2. Step 2: Convert to fraction form
    139,553.40/209,378.70 = 60,724.20/x
  3. Step 3: Cross multiply
    139,553.40x = 209,378.70 × 60,724.20
  4. Step 4: Simplify right side
    139,553.40x = 12,714,354,054.54
  5. Step 5: Solve for x
    x = 12,714,354,054.54/139,553.40
  6. Step 6: Final answer
    x = 91,107.45

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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.