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Finding the Fourth Proportional to 69,915, 96,489.99 and 39,708.48

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Solution

The fourth proportional to 69,915, 96,489.99 and 39,708.48 is: 54,801.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,915 : 96,489.99 = 39,708.48 : x
  2. Step 2: Convert to fraction form
    69,915/96,489.99 = 39,708.48/x
  3. Step 3: Cross multiply
    69,915x = 96,489.99 × 39,708.48
  4. Step 4: Simplify right side
    69,915x = 3,831,470,838.12
  5. Step 5: Solve for x
    x = 3,831,470,838.12/69,915
  6. Step 6: Final answer
    x = 54,801.84

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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.