Home / 90,709.68-136,034.24-38,109.36

Finding the Fourth Proportional to 90,709.68, 136,034.24 and 38,109.36

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Solution

The fourth proportional to 90,709.68, 136,034.24 and 38,109.36 is: 57,151.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,709.68 : 136,034.24 = 38,109.36 : x
  2. Step 2: Convert to fraction form
    90,709.68/136,034.24 = 38,109.36/x
  3. Step 3: Cross multiply
    90,709.68x = 136,034.24 × 38,109.36
  4. Step 4: Simplify right side
    90,709.68x = 5,184,177,824.49
  5. Step 5: Solve for x
    x = 5,184,177,824.49/90,709.68
  6. Step 6: Final answer
    x = 57,151.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.