Home / 100,811.10-151,216.65-70,743.90

Finding the Fourth Proportional to 100,811.10, 151,216.65 and 70,743.90

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Solution

The fourth proportional to 100,811.10, 151,216.65 and 70,743.90 is: 106,115.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,811.10 : 151,216.65 = 70,743.90 : x
  2. Step 2: Convert to fraction form
    100,811.10/151,216.65 = 70,743.90/x
  3. Step 3: Cross multiply
    100,811.10x = 151,216.65 × 70,743.90
  4. Step 4: Simplify right side
    100,811.10x = 10,697,655,565.94
  5. Step 5: Solve for x
    x = 10,697,655,565.94/100,811.10
  6. Step 6: Final answer
    x = 106,115.85

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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.