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Finding the Fourth Proportional to 55,963.60, 83,935.80 and 20,885.20

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Solution

The fourth proportional to 55,963.60, 83,935.80 and 20,885.20 is: 31,324.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,963.60 : 83,935.80 = 20,885.20 : x
  2. Step 2: Convert to fraction form
    55,963.60/83,935.80 = 20,885.20/x
  3. Step 3: Cross multiply
    55,963.60x = 83,935.80 × 20,885.20
  4. Step 4: Simplify right side
    55,963.60x = 1,753,015,970.16
  5. Step 5: Solve for x
    x = 1,753,015,970.16/55,963.60
  6. Step 6: Final answer
    x = 31,324.22

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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.