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Finding the Fourth Proportional to 139,051.80, 191,891.88 and 75,389.61

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Solution

The fourth proportional to 139,051.80, 191,891.88 and 75,389.61 is: 104,037.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,051.80 : 191,891.88 = 75,389.61 : x
  2. Step 2: Convert to fraction form
    139,051.80/191,891.88 = 75,389.61/x
  3. Step 3: Cross multiply
    139,051.80x = 191,891.88 × 75,389.61
  4. Step 4: Simplify right side
    139,051.80x = 14,466,653,995.37
  5. Step 5: Solve for x
    x = 14,466,653,995.37/139,051.80
  6. Step 6: Final answer
    x = 104,037.88

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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.