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Finding the Fourth Proportional to 69,972.48, 96,564.72 and 38,143.20

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Solution

The fourth proportional to 69,972.48, 96,564.72 and 38,143.20 is: 52,639.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,972.48 : 96,564.72 = 38,143.20 : x
  2. Step 2: Convert to fraction form
    69,972.48/96,564.72 = 38,143.20/x
  3. Step 3: Cross multiply
    69,972.48x = 96,564.72 × 38,143.20
  4. Step 4: Simplify right side
    69,972.48x = 3,683,287,427.90
  5. Step 5: Solve for x
    x = 3,683,287,427.90/69,972.48
  6. Step 6: Final answer
    x = 52,639.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.