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Finding the Fourth Proportional to 139,964.76, 193,146.48 and 76,301.28

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Solution

The fourth proportional to 139,964.76, 193,146.48 and 76,301.28 is: 105,293.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,964.76 : 193,146.48 = 76,301.28 : x
  2. Step 2: Convert to fraction form
    139,964.76/193,146.48 = 76,301.28/x
  3. Step 3: Cross multiply
    139,964.76x = 193,146.48 × 76,301.28
  4. Step 4: Simplify right side
    139,964.76x = 14,737,323,651.49
  5. Step 5: Solve for x
    x = 14,737,323,651.49/139,964.76
  6. Step 6: Final answer
    x = 105,293.10

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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.