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Finding the Fourth Proportional to 66,220.65, 99,101.84 and 40,909.77

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Solution

The fourth proportional to 66,220.65, 99,101.84 and 40,909.77 is: 61,223.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,220.65 : 99,101.84 = 40,909.77 : x
  2. Step 2: Convert to fraction form
    66,220.65/99,101.84 = 40,909.77/x
  3. Step 3: Cross multiply
    66,220.65x = 99,101.84 × 40,909.77
  4. Step 4: Simplify right side
    66,220.65x = 4,054,233,276.43
  5. Step 5: Solve for x
    x = 4,054,233,276.43/66,220.65
  6. Step 6: Final answer
    x = 61,223.10

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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.