Home / 81,331.65-121,985.53-47,613.24

Finding the Fourth Proportional to 81,331.65, 121,985.53 and 47,613.24

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Solution

The fourth proportional to 81,331.65, 121,985.53 and 47,613.24 is: 71,412.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,331.65 : 121,985.53 = 47,613.24 : x
  2. Step 2: Convert to fraction form
    81,331.65/121,985.53 = 47,613.24/x
  3. Step 3: Cross multiply
    81,331.65x = 121,985.53 × 47,613.24
  4. Step 4: Simplify right side
    81,331.65x = 5,808,126,197.38
  5. Step 5: Solve for x
    x = 5,808,126,197.38/81,331.65
  6. Step 6: Final answer
    x = 71,412.87

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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.