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Finding the Fourth Proportional to 159,878.90, 220,632.09 and 88,258.75

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Solution

The fourth proportional to 159,878.90, 220,632.09 and 88,258.75 is: 121,796.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,878.90 : 220,632.09 = 88,258.75 : x
  2. Step 2: Convert to fraction form
    159,878.90/220,632.09 = 88,258.75/x
  3. Step 3: Cross multiply
    159,878.90x = 220,632.09 × 88,258.75
  4. Step 4: Simplify right side
    159,878.90x = 19,472,712,473.29
  5. Step 5: Solve for x
    x = 19,472,712,473.29/159,878.90
  6. Step 6: Final answer
    x = 121,796.64

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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.