Home / 138,729.16-191,444.88-75,065.56

Finding the Fourth Proportional to 138,729.16, 191,444.88 and 75,065.56

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Solution

The fourth proportional to 138,729.16, 191,444.88 and 75,065.56 is: 103,589.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,729.16 : 191,444.88 = 75,065.56 : x
  2. Step 2: Convert to fraction form
    138,729.16/191,444.88 = 75,065.56/x
  3. Step 3: Cross multiply
    138,729.16x = 191,444.88 × 75,065.56
  4. Step 4: Simplify right side
    138,729.16x = 14,370,917,126.33
  5. Step 5: Solve for x
    x = 14,370,917,126.33/138,729.16
  6. Step 6: Final answer
    x = 103,589.74

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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.