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Finding the Fourth Proportional to 40,807.80, 61,211.70 and 22,145.40

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Solution

The fourth proportional to 40,807.80, 61,211.70 and 22,145.40 is: 33,218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,807.80 : 61,211.70 = 22,145.40 : x
  2. Step 2: Convert to fraction form
    40,807.80/61,211.70 = 22,145.40/x
  3. Step 3: Cross multiply
    40,807.80x = 61,211.70 × 22,145.40
  4. Step 4: Simplify right side
    40,807.80x = 1,355,557,581.18
  5. Step 5: Solve for x
    x = 1,355,557,581.18/40,807.80
  6. Step 6: Final answer
    x = 33,218.10

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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.