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Finding the Fourth Proportional to 123,649.44, 170,638.56 and 75,878.88

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Solution

The fourth proportional to 123,649.44, 170,638.56 and 75,878.88 is: 104,714.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,649.44 : 170,638.56 = 75,878.88 : x
  2. Step 2: Convert to fraction form
    123,649.44/170,638.56 = 75,878.88/x
  3. Step 3: Cross multiply
    123,649.44x = 170,638.56 × 75,878.88
  4. Step 4: Simplify right side
    123,649.44x = 12,947,862,817.61
  5. Step 5: Solve for x
    x = 12,947,862,817.61/123,649.44
  6. Step 6: Final answer
    x = 104,714.29

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1.5x scale

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.