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Finding the Fourth Proportional to 158,658, 238,059.60 and 68,728.20

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Solution

The fourth proportional to 158,658, 238,059.60 and 68,728.20 is: 103,123.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,658 : 238,059.60 = 68,728.20 : x
  2. Step 2: Convert to fraction form
    158,658/238,059.60 = 68,728.20/x
  3. Step 3: Cross multiply
    158,658x = 238,059.60 × 68,728.20
  4. Step 4: Simplify right side
    158,658x = 16,361,407,800.72
  5. Step 5: Solve for x
    x = 16,361,407,800.72/158,658
  6. Step 6: Final answer
    x = 103,123.75

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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.