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Finding the Fourth Proportional to 88,116.98, 121,664.63 and 54,171

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Solution

The fourth proportional to 88,116.98, 121,664.63 and 54,171 is: 74,794.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,116.98 : 121,664.63 = 54,171 : x
  2. Step 2: Convert to fraction form
    88,116.98/121,664.63 = 54,171/x
  3. Step 3: Cross multiply
    88,116.98x = 121,664.63 × 54,171
  4. Step 4: Simplify right side
    88,116.98x = 6,590,694,807.16
  5. Step 5: Solve for x
    x = 6,590,694,807.16/88,116.98
  6. Step 6: Final answer
    x = 74,794.84

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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.