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Finding the Fourth Proportional to 66,705.16, 100,008.06 and 40,403.56

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Solution

The fourth proportional to 66,705.16, 100,008.06 and 40,403.56 is: 60,575.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,705.16 : 100,008.06 = 40,403.56 : x
  2. Step 2: Convert to fraction form
    66,705.16/100,008.06 = 40,403.56/x
  3. Step 3: Cross multiply
    66,705.16x = 100,008.06 × 40,403.56
  4. Step 4: Simplify right side
    66,705.16x = 4,040,681,652.69
  5. Step 5: Solve for x
    x = 4,040,681,652.69/66,705.16
  6. Step 6: Final answer
    x = 60,575.25

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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.