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Finding the Fourth Proportional to 139,449.60, 209,152.38 and 60,542.64

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Solution

The fourth proportional to 139,449.60, 209,152.38 and 60,542.64 is: 90,804.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,449.60 : 209,152.38 = 60,542.64 : x
  2. Step 2: Convert to fraction form
    139,449.60/209,152.38 = 60,542.64/x
  3. Step 3: Cross multiply
    139,449.60x = 209,152.38 × 60,542.64
  4. Step 4: Simplify right side
    139,449.60x = 12,662,637,247.48
  5. Step 5: Solve for x
    x = 12,662,637,247.48/139,449.60
  6. Step 6: Final answer
    x = 90,804.40

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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.