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Finding the Fourth Proportional to 65,137.80, 97,706.70 and 38,872.20

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Solution

The fourth proportional to 65,137.80, 97,706.70 and 38,872.20 is: 58,308.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,137.80 : 97,706.70 = 38,872.20 : x
  2. Step 2: Convert to fraction form
    65,137.80/97,706.70 = 38,872.20/x
  3. Step 3: Cross multiply
    65,137.80x = 97,706.70 × 38,872.20
  4. Step 4: Simplify right side
    65,137.80x = 3,798,074,383.74
  5. Step 5: Solve for x
    x = 3,798,074,383.74/65,137.80
  6. Step 6: Final answer
    x = 58,308.30

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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.