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Finding the Fourth Proportional to 108,542.61, 149,788.80 and 66,101.14

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Solution

The fourth proportional to 108,542.61, 149,788.80 and 66,101.14 is: 91,219.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,542.61 : 149,788.80 = 66,101.14 : x
  2. Step 2: Convert to fraction form
    108,542.61/149,788.80 = 66,101.14/x
  3. Step 3: Cross multiply
    108,542.61x = 149,788.80 × 66,101.14
  4. Step 4: Simplify right side
    108,542.61x = 9,901,211,023.02
  5. Step 5: Solve for x
    x = 9,901,211,023.02/108,542.61
  6. Step 6: Final answer
    x = 91,219.58

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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.