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Finding the Fourth Proportional to 101,449.10, 140,029.90 and 65,638.20

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Solution

The fourth proportional to 101,449.10, 140,029.90 and 65,638.20 is: 90,600.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,449.10 : 140,029.90 = 65,638.20 : x
  2. Step 2: Convert to fraction form
    101,449.10/140,029.90 = 65,638.20/x
  3. Step 3: Cross multiply
    101,449.10x = 140,029.90 × 65,638.20
  4. Step 4: Simplify right side
    101,449.10x = 9,191,310,582.18
  5. Step 5: Solve for x
    x = 9,191,310,582.18/101,449.10
  6. Step 6: Final answer
    x = 90,600.22

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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.