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Finding the Fourth Proportional to 56,081.72, 84,119.28 and 21,018.44

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Solution

The fourth proportional to 56,081.72, 84,119.28 and 21,018.44 is: 31,526.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,081.72 : 84,119.28 = 21,018.44 : x
  2. Step 2: Convert to fraction form
    56,081.72/84,119.28 = 21,018.44/x
  3. Step 3: Cross multiply
    56,081.72x = 84,119.28 × 21,018.44
  4. Step 4: Simplify right side
    56,081.72x = 1,768,056,039.52
  5. Step 5: Solve for x
    x = 1,768,056,039.52/56,081.72
  6. Step 6: Final answer
    x = 31,526.42

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1.5x scale

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.