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Finding the Fourth Proportional to 100,263.66, 138,363.85 and 59,979.12

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Solution

The fourth proportional to 100,263.66, 138,363.85 and 59,979.12 is: 82,771.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,263.66 : 138,363.85 = 59,979.12 : x
  2. Step 2: Convert to fraction form
    100,263.66/138,363.85 = 59,979.12/x
  3. Step 3: Cross multiply
    100,263.66x = 138,363.85 × 59,979.12
  4. Step 4: Simplify right side
    100,263.66x = 8,298,941,181.54
  5. Step 5: Solve for x
    x = 8,298,941,181.54/100,263.66
  6. Step 6: Final answer
    x = 82,771.18

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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.