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Finding the Fourth Proportional to 66,020.40, 99,079.20 and 26,605.80

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Solution

The fourth proportional to 66,020.40, 99,079.20 and 26,605.80 is: 39,928.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,020.40 : 99,079.20 = 26,605.80 : x
  2. Step 2: Convert to fraction form
    66,020.40/99,079.20 = 26,605.80/x
  3. Step 3: Cross multiply
    66,020.40x = 99,079.20 × 26,605.80
  4. Step 4: Simplify right side
    66,020.40x = 2,636,081,379.36
  5. Step 5: Solve for x
    x = 2,636,081,379.36/66,020.40
  6. Step 6: Final answer
    x = 39,928.29

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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.