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Finding the Fourth Proportional to 139,175.16, 208,769.76 and 39,342.52

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Solution

The fourth proportional to 139,175.16, 208,769.76 and 39,342.52 is: 59,015.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,175.16 : 208,769.76 = 39,342.52 : x
  2. Step 2: Convert to fraction form
    139,175.16/208,769.76 = 39,342.52/x
  3. Step 3: Cross multiply
    139,175.16x = 208,769.76 × 39,342.52
  4. Step 4: Simplify right side
    139,175.16x = 8,213,528,458.20
  5. Step 5: Solve for x
    x = 8,213,528,458.20/139,175.16
  6. Step 6: Final answer
    x = 59,015.76

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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.