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Finding the Fourth Proportional to 66,596.80, 99,765.60 and 40,223.20

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Solution

The fourth proportional to 66,596.80, 99,765.60 and 40,223.20 is: 60,256.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,596.80 : 99,765.60 = 40,223.20 : x
  2. Step 2: Convert to fraction form
    66,596.80/99,765.60 = 40,223.20/x
  3. Step 3: Cross multiply
    66,596.80x = 99,765.60 × 40,223.20
  4. Step 4: Simplify right side
    66,596.80x = 4,012,891,681.92
  5. Step 5: Solve for x
    x = 4,012,891,681.92/66,596.80
  6. Step 6: Final answer
    x = 60,256.52

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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.