Home / 90,969.36-136,412.68-38,350.12

Finding the Fourth Proportional to 90,969.36, 136,412.68 and 38,350.12

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Solution

The fourth proportional to 90,969.36, 136,412.68 and 38,350.12 is: 57,507.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,969.36 : 136,412.68 = 38,350.12 : x
  2. Step 2: Convert to fraction form
    90,969.36/136,412.68 = 38,350.12/x
  3. Step 3: Cross multiply
    90,969.36x = 136,412.68 × 38,350.12
  4. Step 4: Simplify right side
    90,969.36x = 5,231,442,647.52
  5. Step 5: Solve for x
    x = 5,231,442,647.52/90,969.36
  6. Step 6: Final answer
    x = 57,507.74

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1.5x scale

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.