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Finding the Fourth Proportional to 66,195.40, 99,206.70 and 26,720.20

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Solution

The fourth proportional to 66,195.40, 99,206.70 and 26,720.20 is: 40,045.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,195.40 : 99,206.70 = 26,720.20 : x
  2. Step 2: Convert to fraction form
    66,195.40/99,206.70 = 26,720.20/x
  3. Step 3: Cross multiply
    66,195.40x = 99,206.70 × 26,720.20
  4. Step 4: Simplify right side
    66,195.40x = 2,650,822,865.34
  5. Step 5: Solve for x
    x = 2,650,822,865.34/66,195.40
  6. Step 6: Final answer
    x = 40,045.42

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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.