Home / 138,971.60-191,780.96-75,309.51

Finding the Fourth Proportional to 138,971.60, 191,780.96 and 75,309.51

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Solution

The fourth proportional to 138,971.60, 191,780.96 and 75,309.51 is: 103,927.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,971.60 : 191,780.96 = 75,309.51 : x
  2. Step 2: Convert to fraction form
    138,971.60/191,780.96 = 75,309.51/x
  3. Step 3: Cross multiply
    138,971.60x = 191,780.96 × 75,309.51
  4. Step 4: Simplify right side
    138,971.60x = 14,442,930,124.93
  5. Step 5: Solve for x
    x = 14,442,930,124.93/138,971.60
  6. Step 6: Final answer
    x = 103,927.21

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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.