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Finding the Fourth Proportional to 77,310.72, 106,903.56 and 61,367.52

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Solution

The fourth proportional to 77,310.72, 106,903.56 and 61,367.52 is: 84,857.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,310.72 : 106,903.56 = 61,367.52 : x
  2. Step 2: Convert to fraction form
    77,310.72/106,903.56 = 61,367.52/x
  3. Step 3: Cross multiply
    77,310.72x = 106,903.56 × 61,367.52
  4. Step 4: Simplify right side
    77,310.72x = 6,560,406,356.37
  5. Step 5: Solve for x
    x = 6,560,406,356.37/77,310.72
  6. Step 6: Final answer
    x = 84,857.65

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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.