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Finding the Fourth Proportional to 66,764.90, 100,140.86 and 17,516.90

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Solution

The fourth proportional to 66,764.90, 100,140.86 and 17,516.90 is: 26,273.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,764.90 : 100,140.86 = 17,516.90 : x
  2. Step 2: Convert to fraction form
    66,764.90/100,140.86 = 17,516.90/x
  3. Step 3: Cross multiply
    66,764.90x = 100,140.86 × 17,516.90
  4. Step 4: Simplify right side
    66,764.90x = 1,754,157,430.53
  5. Step 5: Solve for x
    x = 1,754,157,430.53/66,764.90
  6. Step 6: Final answer
    x = 26,273.65

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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.