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Finding the Fourth Proportional to 108,615.78, 149,889.53 and 66,174.34

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Solution

The fourth proportional to 108,615.78, 149,889.53 and 66,174.34 is: 91,320.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,615.78 : 149,889.53 = 66,174.34 : x
  2. Step 2: Convert to fraction form
    108,615.78/149,889.53 = 66,174.34/x
  3. Step 3: Cross multiply
    108,615.78x = 149,889.53 × 66,174.34
  4. Step 4: Simplify right side
    108,615.78x = 9,918,840,720.66
  5. Step 5: Solve for x
    x = 9,918,840,720.66/108,615.78
  6. Step 6: Final answer
    x = 91,320.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.