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Finding the Fourth Proportional to 160,389.71, 221,329.91 and 91,481.90

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Solution

The fourth proportional to 160,389.71, 221,329.91 and 91,481.90 is: 126,240.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,389.71 : 221,329.91 = 91,481.90 : x
  2. Step 2: Convert to fraction form
    160,389.71/221,329.91 = 91,481.90/x
  3. Step 3: Cross multiply
    160,389.71x = 221,329.91 × 91,481.90
  4. Step 4: Simplify right side
    160,389.71x = 20,247,681,475.66
  5. Step 5: Solve for x
    x = 20,247,681,475.66/160,389.71
  6. Step 6: Final answer
    x = 126,240.52

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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.