Home / 138,581.03-191,242.28-74,919.28

Finding the Fourth Proportional to 138,581.03, 191,242.28 and 74,919.28

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Solution

The fourth proportional to 138,581.03, 191,242.28 and 74,919.28 is: 103,388.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,581.03 : 191,242.28 = 74,919.28 : x
  2. Step 2: Convert to fraction form
    138,581.03/191,242.28 = 74,919.28/x
  3. Step 3: Cross multiply
    138,581.03x = 191,242.28 × 74,919.28
  4. Step 4: Simplify right side
    138,581.03x = 14,327,733,923.16
  5. Step 5: Solve for x
    x = 14,327,733,923.16/138,581.03
  6. Step 6: Final answer
    x = 103,388.85

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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.