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Finding the Fourth Proportional to 77,879.94, 116,818.22 and 21,718.56

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Solution

The fourth proportional to 77,879.94, 116,818.22 and 21,718.56 is: 32,577.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,879.94 : 116,818.22 = 21,718.56 : x
  2. Step 2: Convert to fraction form
    77,879.94/116,818.22 = 21,718.56/x
  3. Step 3: Cross multiply
    77,879.94x = 116,818.22 × 21,718.56
  4. Step 4: Simplify right side
    77,879.94x = 2,537,123,520.16
  5. Step 5: Solve for x
    x = 2,537,123,520.16/77,879.94
  6. Step 6: Final answer
    x = 32,577.37

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1.5x scale

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.