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Finding the Fourth Proportional to 139,886.44, 193,037.24 and 79,456.90

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Solution

The fourth proportional to 139,886.44, 193,037.24 and 79,456.90 is: 109,647.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,886.44 : 193,037.24 = 79,456.90 : x
  2. Step 2: Convert to fraction form
    139,886.44/193,037.24 = 79,456.90/x
  3. Step 3: Cross multiply
    139,886.44x = 193,037.24 × 79,456.90
  4. Step 4: Simplify right side
    139,886.44x = 15,338,139,312.49
  5. Step 5: Solve for x
    x = 15,338,139,312.49/139,886.44
  6. Step 6: Final answer
    x = 109,647.08

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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.