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Finding the Fourth Proportional to 101,781.36, 152,759.88 and 70,638.48

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Solution

The fourth proportional to 101,781.36, 152,759.88 and 70,638.48 is: 106,018.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,781.36 : 152,759.88 = 70,638.48 : x
  2. Step 2: Convert to fraction form
    101,781.36/152,759.88 = 70,638.48/x
  3. Step 3: Cross multiply
    101,781.36x = 152,759.88 × 70,638.48
  4. Step 4: Simplify right side
    101,781.36x = 10,790,725,728.18
  5. Step 5: Solve for x
    x = 10,790,725,728.18/101,781.36
  6. Step 6: Final answer
    x = 106,018.68

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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.