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Finding the Fourth Proportional to 77,920.98, 116,747.17 and 60,858.28

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Solution

The fourth proportional to 77,920.98, 116,747.17 and 60,858.28 is: 91,182.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,920.98 : 116,747.17 = 60,858.28 : x
  2. Step 2: Convert to fraction form
    77,920.98/116,747.17 = 60,858.28/x
  3. Step 3: Cross multiply
    77,920.98x = 116,747.17 × 60,858.28
  4. Step 4: Simplify right side
    77,920.98x = 7,105,031,961.07
  5. Step 5: Solve for x
    x = 7,105,031,961.07/77,920.98
  6. Step 6: Final answer
    x = 91,182.53

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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.