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Finding the Fourth Proportional to 139,650.27, 192,718.23 and 75,988.47

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Solution

The fourth proportional to 139,650.27, 192,718.23 and 75,988.47 is: 104,864.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,650.27 : 192,718.23 = 75,988.47 : x
  2. Step 2: Convert to fraction form
    139,650.27/192,718.23 = 75,988.47/x
  3. Step 3: Cross multiply
    139,650.27x = 192,718.23 × 75,988.47
  4. Step 4: Simplify right side
    139,650.27x = 14,644,363,438.81
  5. Step 5: Solve for x
    x = 14,644,363,438.81/139,650.27
  6. Step 6: Final answer
    x = 104,864.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.