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Finding the Fourth Proportional to 72,297.70, 99,770.78 and 40,466.58

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Solution

The fourth proportional to 72,297.70, 99,770.78 and 40,466.58 is: 55,843.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,297.70 : 99,770.78 = 40,466.58 : x
  2. Step 2: Convert to fraction form
    72,297.70/99,770.78 = 40,466.58/x
  3. Step 3: Cross multiply
    72,297.70x = 99,770.78 × 40,466.58
  4. Step 4: Simplify right side
    72,297.70x = 4,037,382,250.53
  5. Step 5: Solve for x
    x = 4,037,382,250.53/72,297.70
  6. Step 6: Final answer
    x = 55,843.85

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1.5x scale

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.