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Finding the Fourth Proportional to 108,613.56, 149,886.42 and 66,172.08

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Solution

The fourth proportional to 108,613.56, 149,886.42 and 66,172.08 is: 91,317.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,613.56 : 149,886.42 = 66,172.08 : x
  2. Step 2: Convert to fraction form
    108,613.56/149,886.42 = 66,172.08/x
  3. Step 3: Cross multiply
    108,613.56x = 149,886.42 × 66,172.08
  4. Step 4: Simplify right side
    108,613.56x = 9,918,296,175.15
  5. Step 5: Solve for x
    x = 9,918,296,175.15/108,613.56
  6. Step 6: Final answer
    x = 91,317.29

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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.