Home / 87,939.84-121,371.30-65,428.32

Finding the Fourth Proportional to 87,939.84, 121,371.30 and 65,428.32

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Solution

The fourth proportional to 87,939.84, 121,371.30 and 65,428.32 is: 90,301.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,939.84 : 121,371.30 = 65,428.32 : x
  2. Step 2: Convert to fraction form
    87,939.84/121,371.30 = 65,428.32/x
  3. Step 3: Cross multiply
    87,939.84x = 121,371.30 × 65,428.32
  4. Step 4: Simplify right side
    87,939.84x = 7,941,120,255.22
  5. Step 5: Solve for x
    x = 7,941,120,255.22/87,939.84
  6. Step 6: Final answer
    x = 90,301.74

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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.