Home / 87,284.71-120,458.06-65,736.45

Finding the Fourth Proportional to 87,284.71, 120,458.06 and 65,736.45

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Solution

The fourth proportional to 87,284.71, 120,458.06 and 65,736.45 is: 90,720.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,284.71 : 120,458.06 = 65,736.45 : x
  2. Step 2: Convert to fraction form
    87,284.71/120,458.06 = 65,736.45/x
  3. Step 3: Cross multiply
    87,284.71x = 120,458.06 × 65,736.45
  4. Step 4: Simplify right side
    87,284.71x = 7,918,485,238.29
  5. Step 5: Solve for x
    x = 7,918,485,238.29/87,284.71
  6. Step 6: Final answer
    x = 90,720.19

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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.