Home / 87,145.69-120,221.11-51,318.53

Finding the Fourth Proportional to 87,145.69, 120,221.11 and 51,318.53

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Solution

The fourth proportional to 87,145.69, 120,221.11 and 51,318.53 is: 70,796.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,145.69 : 120,221.11 = 51,318.53 : x
  2. Step 2: Convert to fraction form
    87,145.69/120,221.11 = 51,318.53/x
  3. Step 3: Cross multiply
    87,145.69x = 120,221.11 × 51,318.53
  4. Step 4: Simplify right side
    87,145.69x = 6,169,570,554.04
  5. Step 5: Solve for x
    x = 6,169,570,554.04/87,145.69
  6. Step 6: Final answer
    x = 70,796.05

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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.