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Finding the Fourth Proportional to 139,580.30, 209,305.65 and 60,653.90

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Solution

The fourth proportional to 139,580.30, 209,305.65 and 60,653.90 is: 90,952.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,580.30 : 209,305.65 = 60,653.90 : x
  2. Step 2: Convert to fraction form
    139,580.30/209,305.65 = 60,653.90/x
  3. Step 3: Cross multiply
    139,580.30x = 209,305.65 × 60,653.90
  4. Step 4: Simplify right side
    139,580.30x = 12,695,203,964.54
  5. Step 5: Solve for x
    x = 12,695,203,964.54/139,580.30
  6. Step 6: Final answer
    x = 90,952.69

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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.