Home / 91,069.55-135,891.99-81,613.20

Finding the Fourth Proportional to 91,069.55, 135,891.99 and 81,613.20

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Solution

The fourth proportional to 91,069.55, 135,891.99 and 81,613.20 is: 121,781.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,069.55 : 135,891.99 = 81,613.20 : x
  2. Step 2: Convert to fraction form
    91,069.55/135,891.99 = 81,613.20/x
  3. Step 3: Cross multiply
    91,069.55x = 135,891.99 × 81,613.20
  4. Step 4: Simplify right side
    91,069.55x = 11,090,580,158.27
  5. Step 5: Solve for x
    x = 11,090,580,158.27/91,069.55
  6. Step 6: Final answer
    x = 121,781.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.