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Finding the Fourth Proportional to 112,770.80, 168,718.80 and 73,404.80

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Solution

The fourth proportional to 112,770.80, 168,718.80 and 73,404.80 is: 109,822.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,770.80 : 168,718.80 = 73,404.80 : x
  2. Step 2: Convert to fraction form
    112,770.80/168,718.80 = 73,404.80/x
  3. Step 3: Cross multiply
    112,770.80x = 168,718.80 × 73,404.80
  4. Step 4: Simplify right side
    112,770.80x = 12,384,769,770.24
  5. Step 5: Solve for x
    x = 12,384,769,770.24/112,770.80
  6. Step 6: Final answer
    x = 109,822.49

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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.