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Finding the Fourth Proportional to 74,189.70, 111,284.55 and 71,565.30

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Solution

The fourth proportional to 74,189.70, 111,284.55 and 71,565.30 is: 107,347.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,189.70 : 111,284.55 = 71,565.30 : x
  2. Step 2: Convert to fraction form
    74,189.70/111,284.55 = 71,565.30/x
  3. Step 3: Cross multiply
    74,189.70x = 111,284.55 × 71,565.30
  4. Step 4: Simplify right side
    74,189.70x = 7,964,112,206.12
  5. Step 5: Solve for x
    x = 7,964,112,206.12/74,189.70
  6. Step 6: Final answer
    x = 107,347.95

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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.