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Finding the Fourth Proportional to 100,278.28, 138,379.92 and 59,968.28

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Solution

The fourth proportional to 100,278.28, 138,379.92 and 59,968.28 is: 82,753.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,278.28 : 138,379.92 = 59,968.28 : x
  2. Step 2: Convert to fraction form
    100,278.28/138,379.92 = 59,968.28/x
  3. Step 3: Cross multiply
    100,278.28x = 138,379.92 × 59,968.28
  4. Step 4: Simplify right side
    100,278.28x = 8,298,405,788.94
  5. Step 5: Solve for x
    x = 8,298,405,788.94/100,278.28
  6. Step 6: Final answer
    x = 82,753.77

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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.