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Finding the Fourth Proportional to 87,288.80, 130,933.20 and 59,640.80

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Solution

The fourth proportional to 87,288.80, 130,933.20 and 59,640.80 is: 89,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,288.80 : 130,933.20 = 59,640.80 : x
  2. Step 2: Convert to fraction form
    87,288.80/130,933.20 = 59,640.80/x
  3. Step 3: Cross multiply
    87,288.80x = 130,933.20 × 59,640.80
  4. Step 4: Simplify right side
    87,288.80x = 7,808,960,794.56
  5. Step 5: Solve for x
    x = 7,808,960,794.56/87,288.80
  6. Step 6: Final answer
    x = 89,461.20

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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.