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Finding the Fourth Proportional to 56,137.40, 84,187.88 and 18,687.42

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Solution

The fourth proportional to 56,137.40, 84,187.88 and 18,687.42 is: 28,025.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,137.40 : 84,187.88 = 18,687.42 : x
  2. Step 2: Convert to fraction form
    56,137.40/84,187.88 = 18,687.42/x
  3. Step 3: Cross multiply
    56,137.40x = 84,187.88 × 18,687.42
  4. Step 4: Simplify right side
    56,137.40x = 1,573,254,272.47
  5. Step 5: Solve for x
    x = 1,573,254,272.47/56,137.40
  6. Step 6: Final answer
    x = 28,025.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.