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Finding the Fourth Proportional to 77,698, 107,240.88 and 55,013.36

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Solution

The fourth proportional to 77,698, 107,240.88 and 55,013.36 is: 75,930.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,698 : 107,240.88 = 55,013.36 : x
  2. Step 2: Convert to fraction form
    77,698/107,240.88 = 55,013.36/x
  3. Step 3: Cross multiply
    77,698x = 107,240.88 × 55,013.36
  4. Step 4: Simplify right side
    77,698x = 5,899,681,138.16
  5. Step 5: Solve for x
    x = 5,899,681,138.16/77,698
  6. Step 6: Final answer
    x = 75,930.93

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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.