Home / 87,917.31-121,228.20-63,670.32

Finding the Fourth Proportional to 87,917.31, 121,228.20 and 63,670.32

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Solution

The fourth proportional to 87,917.31, 121,228.20 and 63,670.32 is: 87,794.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,917.31 : 121,228.20 = 63,670.32 : x
  2. Step 2: Convert to fraction form
    87,917.31/121,228.20 = 63,670.32/x
  3. Step 3: Cross multiply
    87,917.31x = 121,228.20 × 63,670.32
  4. Step 4: Simplify right side
    87,917.31x = 7,718,638,287.02
  5. Step 5: Solve for x
    x = 7,718,638,287.02/87,917.31
  6. Step 6: Final answer
    x = 87,794.30

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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.