Home / 138,742.39-191,465-75,080.17

Finding the Fourth Proportional to 138,742.39, 191,465 and 75,080.17

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Solution

The fourth proportional to 138,742.39, 191,465 and 75,080.17 is: 103,610.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,742.39 : 191,465 = 75,080.17 : x
  2. Step 2: Convert to fraction form
    138,742.39/191,465 = 75,080.17/x
  3. Step 3: Cross multiply
    138,742.39x = 191,465 × 75,080.17
  4. Step 4: Simplify right side
    138,742.39x = 14,375,224,749.05
  5. Step 5: Solve for x
    x = 14,375,224,749.05/138,742.39
  6. Step 6: Final answer
    x = 103,610.91

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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.