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Finding the Fourth Proportional to 139,026.25, 191,862.63 and 78,599.44

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Solution

The fourth proportional to 139,026.25, 191,862.63 and 78,599.44 is: 108,470.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,026.25 : 191,862.63 = 78,599.44 : x
  2. Step 2: Convert to fraction form
    139,026.25/191,862.63 = 78,599.44/x
  3. Step 3: Cross multiply
    139,026.25x = 191,862.63 × 78,599.44
  4. Step 4: Simplify right side
    139,026.25x = 15,080,295,514.76
  5. Step 5: Solve for x
    x = 15,080,295,514.76/139,026.25
  6. Step 6: Final answer
    x = 108,470.85

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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.