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Finding the Fourth Proportional to 100,181.88, 138,300.84 and 57,732.12

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Solution

The fourth proportional to 100,181.88, 138,300.84 and 57,732.12 is: 79,699.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,181.88 : 138,300.84 = 57,732.12 : x
  2. Step 2: Convert to fraction form
    100,181.88/138,300.84 = 57,732.12/x
  3. Step 3: Cross multiply
    100,181.88x = 138,300.84 × 57,732.12
  4. Step 4: Simplify right side
    100,181.88x = 7,984,400,690.98
  5. Step 5: Solve for x
    x = 7,984,400,690.98/100,181.88
  6. Step 6: Final answer
    x = 79,699.05

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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.