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Finding the Fourth Proportional to 90,673.12, 135,871.11 and 38,053.90

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Solution

The fourth proportional to 90,673.12, 135,871.11 and 38,053.90 is: 57,022.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,673.12 : 135,871.11 = 38,053.90 : x
  2. Step 2: Convert to fraction form
    90,673.12/135,871.11 = 38,053.90/x
  3. Step 3: Cross multiply
    90,673.12x = 135,871.11 × 38,053.90
  4. Step 4: Simplify right side
    90,673.12x = 5,170,425,632.83
  5. Step 5: Solve for x
    x = 5,170,425,632.83/90,673.12
  6. Step 6: Final answer
    x = 57,022.69

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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.