Home / 66,139.68-91,258.56-39,291.24

Finding the Fourth Proportional to 66,139.68, 91,258.56 and 39,291.24

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Solution

The fourth proportional to 66,139.68, 91,258.56 and 39,291.24 is: 54,213.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,139.68 : 91,258.56 = 39,291.24 : x
  2. Step 2: Convert to fraction form
    66,139.68/91,258.56 = 39,291.24/x
  3. Step 3: Cross multiply
    66,139.68x = 91,258.56 × 39,291.24
  4. Step 4: Simplify right side
    66,139.68x = 3,585,661,983.01
  5. Step 5: Solve for x
    x = 3,585,661,983.01/66,139.68
  6. Step 6: Final answer
    x = 54,213.48

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1.5x scale

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.