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Finding the Fourth Proportional to 69,989.78, 96,587.34 and 39,363.47

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Solution

The fourth proportional to 69,989.78, 96,587.34 and 39,363.47 is: 54,322.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,989.78 : 96,587.34 = 39,363.47 : x
  2. Step 2: Convert to fraction form
    69,989.78/96,587.34 = 39,363.47/x
  3. Step 3: Cross multiply
    69,989.78x = 96,587.34 × 39,363.47
  4. Step 4: Simplify right side
    69,989.78x = 3,802,012,377.53
  5. Step 5: Solve for x
    x = 3,802,012,377.53/69,989.78
  6. Step 6: Final answer
    x = 54,322.40

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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.