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Finding the Fourth Proportional to 77,308.48, 115,963.80 and 21,904.48

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Solution

The fourth proportional to 77,308.48, 115,963.80 and 21,904.48 is: 32,857.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,308.48 : 115,963.80 = 21,904.48 : x
  2. Step 2: Convert to fraction form
    77,308.48/115,963.80 = 21,904.48/x
  3. Step 3: Cross multiply
    77,308.48x = 115,963.80 × 21,904.48
  4. Step 4: Simplify right side
    77,308.48x = 2,540,126,737.82
  5. Step 5: Solve for x
    x = 2,540,126,737.82/77,308.48
  6. Step 6: Final answer
    x = 32,857.03

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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.