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Finding the Fourth Proportional to 68,915.16, 103,393.49 and 21,528.33

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Solution

The fourth proportional to 68,915.16, 103,393.49 and 21,528.33 is: 32,298.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,915.16 : 103,393.49 = 21,528.33 : x
  2. Step 2: Convert to fraction form
    68,915.16/103,393.49 = 21,528.33/x
  3. Step 3: Cross multiply
    68,915.16x = 103,393.49 × 21,528.33
  4. Step 4: Simplify right side
    68,915.16x = 2,225,889,654.48
  5. Step 5: Solve for x
    x = 2,225,889,654.48/68,915.16
  6. Step 6: Final answer
    x = 32,298.99

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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.