Home / 99,756.20-149,707.20-70,231.70

Finding the Fourth Proportional to 99,756.20, 149,707.20 and 70,231.70

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Solution

The fourth proportional to 99,756.20, 149,707.20 and 70,231.70 is: 105,398.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,756.20 : 149,707.20 = 70,231.70 : x
  2. Step 2: Convert to fraction form
    99,756.20/149,707.20 = 70,231.70/x
  3. Step 3: Cross multiply
    99,756.20x = 149,707.20 × 70,231.70
  4. Step 4: Simplify right side
    99,756.20x = 10,514,191,158.24
  5. Step 5: Solve for x
    x = 10,514,191,158.24/99,756.20
  6. Step 6: Final answer
    x = 105,398.87

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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.