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Finding the Fourth Proportional to 72,138.84, 108,219.90 and 22,218.93

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Solution

The fourth proportional to 72,138.84, 108,219.90 and 22,218.93 is: 33,331.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,138.84 : 108,219.90 = 22,218.93 : x
  2. Step 2: Convert to fraction form
    72,138.84/108,219.90 = 22,218.93/x
  3. Step 3: Cross multiply
    72,138.84x = 108,219.90 × 22,218.93
  4. Step 4: Simplify right side
    72,138.84x = 2,404,530,382.71
  5. Step 5: Solve for x
    x = 2,404,530,382.71/72,138.84
  6. Step 6: Final answer
    x = 33,331.98

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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.