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Finding the Fourth Proportional to 56,881.92, 85,335 and 21,821.28

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Solution

The fourth proportional to 56,881.92, 85,335 and 21,821.28 is: 32,736.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,881.92 : 85,335 = 21,821.28 : x
  2. Step 2: Convert to fraction form
    56,881.92/85,335 = 21,821.28/x
  3. Step 3: Cross multiply
    56,881.92x = 85,335 × 21,821.28
  4. Step 4: Simplify right side
    56,881.92x = 1,862,118,928.80
  5. Step 5: Solve for x
    x = 1,862,118,928.80/56,881.92
  6. Step 6: Final answer
    x = 32,736.57

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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.