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Finding the Fourth Proportional to 122,258.46, 168,561.64 and 87,374.80

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Solution

The fourth proportional to 122,258.46, 168,561.64 and 87,374.80 is: 120,466.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,258.46 : 168,561.64 = 87,374.80 : x
  2. Step 2: Convert to fraction form
    122,258.46/168,561.64 = 87,374.80/x
  3. Step 3: Cross multiply
    122,258.46x = 168,561.64 × 87,374.80
  4. Step 4: Simplify right side
    122,258.46x = 14,728,039,582.67
  5. Step 5: Solve for x
    x = 14,728,039,582.67/122,258.46
  6. Step 6: Final answer
    x = 120,466.42

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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.