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Finding the Fourth Proportional to 72,251.81, 108,408.85 and 30,140.18

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Solution

The fourth proportional to 72,251.81, 108,408.85 and 30,140.18 is: 45,223.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,251.81 : 108,408.85 = 30,140.18 : x
  2. Step 2: Convert to fraction form
    72,251.81/108,408.85 = 30,140.18/x
  3. Step 3: Cross multiply
    72,251.81x = 108,408.85 × 30,140.18
  4. Step 4: Simplify right side
    72,251.81x = 3,267,462,252.59
  5. Step 5: Solve for x
    x = 3,267,462,252.59/72,251.81
  6. Step 6: Final answer
    x = 45,223.26

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1.5x scale

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.