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Finding the Fourth Proportional to 112,368.80, 168,662.40 and 87,677.60

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Solution

The fourth proportional to 112,368.80, 168,662.40 and 87,677.60 is: 131,601.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,368.80 : 168,662.40 = 87,677.60 : x
  2. Step 2: Convert to fraction form
    112,368.80/168,662.40 = 87,677.60/x
  3. Step 3: Cross multiply
    112,368.80x = 168,662.40 × 87,677.60
  4. Step 4: Simplify right side
    112,368.80x = 14,787,914,442.24
  5. Step 5: Solve for x
    x = 14,787,914,442.24/112,368.80
  6. Step 6: Final answer
    x = 131,601.61

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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.