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Finding the Fourth Proportional to 160,685.79, 221,742.79 and 89,065.18

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Solution

The fourth proportional to 160,685.79, 221,742.79 and 89,065.18 is: 122,907.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,685.79 : 221,742.79 = 89,065.18 : x
  2. Step 2: Convert to fraction form
    160,685.79/221,742.79 = 89,065.18/x
  3. Step 3: Cross multiply
    160,685.79x = 221,742.79 × 89,065.18
  4. Step 4: Simplify right side
    160,685.79x = 19,749,561,505.05
  5. Step 5: Solve for x
    x = 19,749,561,505.05/160,685.79
  6. Step 6: Final answer
    x = 122,907.95

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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.