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Finding the Fourth Proportional to 70,987.55, 106,299.21 and 68,885.33

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Solution

The fourth proportional to 70,987.55, 106,299.21 and 68,885.33 is: 103,151.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,987.55 : 106,299.21 = 68,885.33 : x
  2. Step 2: Convert to fraction form
    70,987.55/106,299.21 = 68,885.33/x
  3. Step 3: Cross multiply
    70,987.55x = 106,299.21 × 68,885.33
  4. Step 4: Simplify right side
    70,987.55x = 7,322,456,159.59
  5. Step 5: Solve for x
    x = 7,322,456,159.59/70,987.55
  6. Step 6: Final answer
    x = 103,151.27

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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.