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Finding the Fourth Proportional to 81,276.99, 112,201.40 and 54,098.30

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Solution

The fourth proportional to 81,276.99, 112,201.40 and 54,098.30 is: 74,681.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,276.99 : 112,201.40 = 54,098.30 : x
  2. Step 2: Convert to fraction form
    81,276.99/112,201.40 = 54,098.30/x
  3. Step 3: Cross multiply
    81,276.99x = 112,201.40 × 54,098.30
  4. Step 4: Simplify right side
    81,276.99x = 6,069,904,997.62
  5. Step 5: Solve for x
    x = 6,069,904,997.62/81,276.99
  6. Step 6: Final answer
    x = 74,681.71

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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.