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Finding the Fourth Proportional to 87,690.72, 131,566.68 and 27,728.40

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Solution

The fourth proportional to 87,690.72, 131,566.68 and 27,728.40 is: 41,602.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,690.72 : 131,566.68 = 27,728.40 : x
  2. Step 2: Convert to fraction form
    87,690.72/131,566.68 = 27,728.40/x
  3. Step 3: Cross multiply
    87,690.72x = 131,566.68 × 27,728.40
  4. Step 4: Simplify right side
    87,690.72x = 3,648,133,529.71
  5. Step 5: Solve for x
    x = 3,648,133,529.71/87,690.72
  6. Step 6: Final answer
    x = 41,602.28

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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.