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Finding the Fourth Proportional to 78,374.78, 117,562.16 and 19,211.03

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Solution

The fourth proportional to 78,374.78, 117,562.16 and 19,211.03 is: 28,816.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,374.78 : 117,562.16 = 19,211.03 : x
  2. Step 2: Convert to fraction form
    78,374.78/117,562.16 = 19,211.03/x
  3. Step 3: Cross multiply
    78,374.78x = 117,562.16 × 19,211.03
  4. Step 4: Simplify right side
    78,374.78x = 2,258,489,642.84
  5. Step 5: Solve for x
    x = 2,258,489,642.84/78,374.78
  6. Step 6: Final answer
    x = 28,816.54

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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.