Home / 87,639.70-131,427.15-28,477.30

Finding the Fourth Proportional to 87,639.70, 131,427.15 and 28,477.30

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Solution

The fourth proportional to 87,639.70, 131,427.15 and 28,477.30 is: 42,705.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,639.70 : 131,427.15 = 28,477.30 : x
  2. Step 2: Convert to fraction form
    87,639.70/131,427.15 = 28,477.30/x
  3. Step 3: Cross multiply
    87,639.70x = 131,427.15 × 28,477.30
  4. Step 4: Simplify right side
    87,639.70x = 3,742,690,378.70
  5. Step 5: Solve for x
    x = 3,742,690,378.70/87,639.70
  6. Step 6: Final answer
    x = 42,705.42

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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.