Home / 138,717.87-191,431.15-75,055.66

Finding the Fourth Proportional to 138,717.87, 191,431.15 and 75,055.66

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Solution

The fourth proportional to 138,717.87, 191,431.15 and 75,055.66 is: 103,577.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,717.87 : 191,431.15 = 75,055.66 : x
  2. Step 2: Convert to fraction form
    138,717.87/191,431.15 = 75,055.66/x
  3. Step 3: Cross multiply
    138,717.87x = 191,431.15 × 75,055.66
  4. Step 4: Simplify right side
    138,717.87x = 14,367,991,718.39
  5. Step 5: Solve for x
    x = 14,367,991,718.39/138,717.87
  6. Step 6: Final answer
    x = 103,577.08

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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.