Home / 92,421.72-138,618.12-30,091.80

Finding the Fourth Proportional to 92,421.72, 138,618.12 and 30,091.80

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Solution

The fourth proportional to 92,421.72, 138,618.12 and 30,091.80 is: 45,132.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,421.72 : 138,618.12 = 30,091.80 : x
  2. Step 2: Convert to fraction form
    92,421.72/138,618.12 = 30,091.80/x
  3. Step 3: Cross multiply
    92,421.72x = 138,618.12 × 30,091.80
  4. Step 4: Simplify right side
    92,421.72x = 4,171,268,743.42
  5. Step 5: Solve for x
    x = 4,171,268,743.42/92,421.72
  6. Step 6: Final answer
    x = 45,132.99

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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.