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Finding the Fourth Proportional to 139,865.50, 193,014.39 and 76,203.28

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Solution

The fourth proportional to 139,865.50, 193,014.39 and 76,203.28 is: 105,160.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,865.50 : 193,014.39 = 76,203.28 : x
  2. Step 2: Convert to fraction form
    139,865.50/193,014.39 = 76,203.28/x
  3. Step 3: Cross multiply
    139,865.50x = 193,014.39 × 76,203.28
  4. Step 4: Simplify right side
    139,865.50x = 14,708,329,605.20
  5. Step 5: Solve for x
    x = 14,708,329,605.20/139,865.50
  6. Step 6: Final answer
    x = 105,160.53

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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.