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Finding the Fourth Proportional to 77,879.49, 116,817.55 and 21,718.10

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Solution

The fourth proportional to 77,879.49, 116,817.55 and 21,718.10 is: 32,576.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,879.49 : 116,817.55 = 21,718.10 : x
  2. Step 2: Convert to fraction form
    77,879.49/116,817.55 = 21,718.10/x
  3. Step 3: Cross multiply
    77,879.49x = 116,817.55 × 21,718.10
  4. Step 4: Simplify right side
    77,879.49x = 2,537,055,294.56
  5. Step 5: Solve for x
    x = 2,537,055,294.56/77,879.49
  6. Step 6: Final answer
    x = 32,576.68

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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.