Home / 138,742.35-191,465.81-75,081.51

Finding the Fourth Proportional to 138,742.35, 191,465.81 and 75,081.51

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Solution

The fourth proportional to 138,742.35, 191,465.81 and 75,081.51 is: 103,613.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,742.35 : 191,465.81 = 75,081.51 : x
  2. Step 2: Convert to fraction form
    138,742.35/191,465.81 = 75,081.51/x
  3. Step 3: Cross multiply
    138,742.35x = 191,465.81 × 75,081.51
  4. Step 4: Simplify right side
    138,742.35x = 14,375,542,128.17
  5. Step 5: Solve for x
    x = 14,375,542,128.17/138,742.35
  6. Step 6: Final answer
    x = 103,613.22

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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.