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Finding the Fourth Proportional to 92,506.66, 138,090.62 and 81,296.87

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Solution

The fourth proportional to 92,506.66, 138,090.62 and 81,296.87 is: 121,357.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,506.66 : 138,090.62 = 81,296.87 : x
  2. Step 2: Convert to fraction form
    92,506.66/138,090.62 = 81,296.87/x
  3. Step 3: Cross multiply
    92,506.66x = 138,090.62 × 81,296.87
  4. Step 4: Simplify right side
    92,506.66x = 11,226,334,695.15
  5. Step 5: Solve for x
    x = 11,226,334,695.15/92,506.66
  6. Step 6: Final answer
    x = 121,357.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.