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Finding the Fourth Proportional to 77,313.72, 106,907.70 and 61,370.52

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Solution

The fourth proportional to 77,313.72, 106,907.70 and 61,370.52 is: 84,861.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,313.72 : 106,907.70 = 61,370.52 : x
  2. Step 2: Convert to fraction form
    77,313.72/106,907.70 = 61,370.52/x
  3. Step 3: Cross multiply
    77,313.72x = 106,907.70 × 61,370.52
  4. Step 4: Simplify right side
    77,313.72x = 6,560,981,141.00
  5. Step 5: Solve for x
    x = 6,560,981,141.00/77,313.72
  6. Step 6: Final answer
    x = 84,861.80

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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.