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Finding the Fourth Proportional to 160,705.88, 221,759.20 and 89,079.80

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Solution

The fourth proportional to 160,705.88, 221,759.20 and 89,079.80 is: 122,921.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,705.88 : 221,759.20 = 89,079.80 : x
  2. Step 2: Convert to fraction form
    160,705.88/221,759.20 = 89,079.80/x
  3. Step 3: Cross multiply
    160,705.88x = 221,759.20 × 89,079.80
  4. Step 4: Simplify right side
    160,705.88x = 19,754,265,515.86
  5. Step 5: Solve for x
    x = 19,754,265,515.86/160,705.88
  6. Step 6: Final answer
    x = 122,921.86

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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.