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Finding the Fourth Proportional to 77,982.58, 107,489.01 and 60,956.77

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Solution

The fourth proportional to 77,982.58, 107,489.01 and 60,956.77 is: 84,021.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,982.58 : 107,489.01 = 60,956.77 : x
  2. Step 2: Convert to fraction form
    77,982.58/107,489.01 = 60,956.77/x
  3. Step 3: Cross multiply
    77,982.58x = 107,489.01 × 60,956.77
  4. Step 4: Simplify right side
    77,982.58x = 6,552,182,860.10
  5. Step 5: Solve for x
    x = 6,552,182,860.10/77,982.58
  6. Step 6: Final answer
    x = 84,021.11

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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.