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Finding the Fourth Proportional to 66,905.88, 100,347.48 and 20,147.88

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Solution

The fourth proportional to 66,905.88, 100,347.48 and 20,147.88 is: 30,218.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,905.88 : 100,347.48 = 20,147.88 : x
  2. Step 2: Convert to fraction form
    66,905.88/100,347.48 = 20,147.88/x
  3. Step 3: Cross multiply
    66,905.88x = 100,347.48 × 20,147.88
  4. Step 4: Simplify right side
    66,905.88x = 2,021,788,985.34
  5. Step 5: Solve for x
    x = 2,021,788,985.34/66,905.88
  6. Step 6: Final answer
    x = 30,218.41

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1.5x scale

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.