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Finding the Fourth Proportional to 160,620.18, 221,649.87 and 92,640

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Solution

The fourth proportional to 160,620.18, 221,649.87 and 92,640 is: 127,839.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,620.18 : 221,649.87 = 92,640 : x
  2. Step 2: Convert to fraction form
    160,620.18/221,649.87 = 92,640/x
  3. Step 3: Cross multiply
    160,620.18x = 221,649.87 × 92,640
  4. Step 4: Simplify right side
    160,620.18x = 20,533,643,956.80
  5. Step 5: Solve for x
    x = 20,533,643,956.80/160,620.18
  6. Step 6: Final answer
    x = 127,839.75

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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.