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Finding the Fourth Proportional to 68,681.39, 103,047.59 and 21,937.91

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Solution

The fourth proportional to 68,681.39, 103,047.59 and 21,937.91 is: 32,915.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,681.39 : 103,047.59 = 21,937.91 : x
  2. Step 2: Convert to fraction form
    68,681.39/103,047.59 = 21,937.91/x
  3. Step 3: Cross multiply
    68,681.39x = 103,047.59 × 21,937.91
  4. Step 4: Simplify right side
    68,681.39x = 2,260,648,294.74
  5. Step 5: Solve for x
    x = 2,260,648,294.74/68,681.39
  6. Step 6: Final answer
    x = 32,915.01

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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.