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Finding the Fourth Proportional to 101,351.68, 139,915.20 and 63,646.72

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Solution

The fourth proportional to 101,351.68, 139,915.20 and 63,646.72 is: 87,863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,351.68 : 139,915.20 = 63,646.72 : x
  2. Step 2: Convert to fraction form
    101,351.68/139,915.20 = 63,646.72/x
  3. Step 3: Cross multiply
    101,351.68x = 139,915.20 × 63,646.72
  4. Step 4: Simplify right side
    101,351.68x = 8,905,143,558.14
  5. Step 5: Solve for x
    x = 8,905,143,558.14/101,351.68
  6. Step 6: Final answer
    x = 87,863.80

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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.