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Finding the Fourth Proportional to 74,686, 111,989.40 and 22,088.20

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Solution

The fourth proportional to 74,686, 111,989.40 and 22,088.20 is: 33,120.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,686 : 111,989.40 = 22,088.20 : x
  2. Step 2: Convert to fraction form
    74,686/111,989.40 = 22,088.20/x
  3. Step 3: Cross multiply
    74,686x = 111,989.40 × 22,088.20
  4. Step 4: Simplify right side
    74,686x = 2,473,644,265.08
  5. Step 5: Solve for x
    x = 2,473,644,265.08/74,686
  6. Step 6: Final answer
    x = 33,120.59

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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.