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Finding the Fourth Proportional to 87,626.60, 131,439.90 and 70,130.60

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Solution

The fourth proportional to 87,626.60, 131,439.90 and 70,130.60 is: 105,195.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,626.60 : 131,439.90 = 70,130.60 : x
  2. Step 2: Convert to fraction form
    87,626.60/131,439.90 = 70,130.60/x
  3. Step 3: Cross multiply
    87,626.60x = 131,439.90 × 70,130.60
  4. Step 4: Simplify right side
    87,626.60x = 9,217,959,050.94
  5. Step 5: Solve for x
    x = 9,217,959,050.94/87,626.60
  6. Step 6: Final answer
    x = 105,195.90

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1.5x scale

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.