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Finding the Fourth Proportional to 110,741.20, 166,111.80 and 91,058.20

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Solution

The fourth proportional to 110,741.20, 166,111.80 and 91,058.20 is: 136,587.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,741.20 : 166,111.80 = 91,058.20 : x
  2. Step 2: Convert to fraction form
    110,741.20/166,111.80 = 91,058.20/x
  3. Step 3: Cross multiply
    110,741.20x = 166,111.80 × 91,058.20
  4. Step 4: Simplify right side
    110,741.20x = 15,125,841,506.76
  5. Step 5: Solve for x
    x = 15,125,841,506.76/110,741.20
  6. Step 6: Final answer
    x = 136,587.30

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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.