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Finding the Fourth Proportional to 78,954.95, 108,956.54 and 43,144.20

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Solution

The fourth proportional to 78,954.95, 108,956.54 and 43,144.20 is: 59,538.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,954.95 : 108,956.54 = 43,144.20 : x
  2. Step 2: Convert to fraction form
    78,954.95/108,956.54 = 43,144.20/x
  3. Step 3: Cross multiply
    78,954.95x = 108,956.54 × 43,144.20
  4. Step 4: Simplify right side
    78,954.95x = 4,700,842,537.35
  5. Step 5: Solve for x
    x = 4,700,842,537.35/78,954.95
  6. Step 6: Final answer
    x = 59,538.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.