Home / 138,719.16-191,431.08-75,055.56

Finding the Fourth Proportional to 138,719.16, 191,431.08 and 75,055.56

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Solution

The fourth proportional to 138,719.16, 191,431.08 and 75,055.56 is: 103,575.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,719.16 : 191,431.08 = 75,055.56 : x
  2. Step 2: Convert to fraction form
    138,719.16/191,431.08 = 75,055.56/x
  3. Step 3: Cross multiply
    138,719.16x = 191,431.08 × 75,055.56
  4. Step 4: Simplify right side
    138,719.16x = 14,367,966,910.80
  5. Step 5: Solve for x
    x = 14,367,966,910.80/138,719.16
  6. Step 6: Final answer
    x = 103,575.94

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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.