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Finding the Fourth Proportional to 87,152.64, 130,727.68 and 21,488.64

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Solution

The fourth proportional to 87,152.64, 130,727.68 and 21,488.64 is: 32,232.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,152.64 : 130,727.68 = 21,488.64 : x
  2. Step 2: Convert to fraction form
    87,152.64/130,727.68 = 21,488.64/x
  3. Step 3: Cross multiply
    87,152.64x = 130,727.68 × 21,488.64
  4. Step 4: Simplify right side
    87,152.64x = 2,809,160,053.56
  5. Step 5: Solve for x
    x = 2,809,160,053.56/87,152.64
  6. Step 6: Final answer
    x = 32,232.64

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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.