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Finding the Fourth Proportional to 138,779.68, 191,517.36 and 75,118.84

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Solution

The fourth proportional to 138,779.68, 191,517.36 and 75,118.84 is: 103,664.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,779.68 : 191,517.36 = 75,118.84 : x
  2. Step 2: Convert to fraction form
    138,779.68/191,517.36 = 75,118.84/x
  3. Step 3: Cross multiply
    138,779.68x = 191,517.36 × 75,118.84
  4. Step 4: Simplify right side
    138,779.68x = 14,386,561,923.06
  5. Step 5: Solve for x
    x = 14,386,561,923.06/138,779.68
  6. Step 6: Final answer
    x = 103,664.76

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1.5x scale

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.