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Finding the Fourth Proportional to 88,893.20, 133,412.70 and 85,977.20

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Solution

The fourth proportional to 88,893.20, 133,412.70 and 85,977.20 is: 129,036.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,893.20 : 133,412.70 = 85,977.20 : x
  2. Step 2: Convert to fraction form
    88,893.20/133,412.70 = 85,977.20/x
  3. Step 3: Cross multiply
    88,893.20x = 133,412.70 × 85,977.20
  4. Step 4: Simplify right side
    88,893.20x = 11,470,450,390.44
  5. Step 5: Solve for x
    x = 11,470,450,390.44/88,893.20
  6. Step 6: Final answer
    x = 129,036.31

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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.