Home / 102,742.20-154,113.30-71,249.40

Finding the Fourth Proportional to 102,742.20, 154,113.30 and 71,249.40

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Solution

The fourth proportional to 102,742.20, 154,113.30 and 71,249.40 is: 106,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,742.20 : 154,113.30 = 71,249.40 : x
  2. Step 2: Convert to fraction form
    102,742.20/154,113.30 = 71,249.40/x
  3. Step 3: Cross multiply
    102,742.20x = 154,113.30 × 71,249.40
  4. Step 4: Simplify right side
    102,742.20x = 10,980,480,157.02
  5. Step 5: Solve for x
    x = 10,980,480,157.02/102,742.20
  6. Step 6: Final answer
    x = 106,874.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.