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Finding the Fourth Proportional to 74,562.85, 111,847.74 and 21,258.45

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Solution

The fourth proportional to 74,562.85, 111,847.74 and 21,258.45 is: 31,888.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,562.85 : 111,847.74 = 21,258.45 : x
  2. Step 2: Convert to fraction form
    74,562.85/111,847.74 = 21,258.45/x
  3. Step 3: Cross multiply
    74,562.85x = 111,847.74 × 21,258.45
  4. Step 4: Simplify right side
    74,562.85x = 2,377,709,508.68
  5. Step 5: Solve for x
    x = 2,377,709,508.68/74,562.85
  6. Step 6: Final answer
    x = 31,888.66

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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.