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Finding the Fourth Proportional to 187,660.78, 280,784.90 and 131,610.30

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Solution

The fourth proportional to 187,660.78, 280,784.90 and 131,610.30 is: 196,920.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,660.78 : 280,784.90 = 131,610.30 : x
  2. Step 2: Convert to fraction form
    187,660.78/280,784.90 = 131,610.30/x
  3. Step 3: Cross multiply
    187,660.78x = 280,784.90 × 131,610.30
  4. Step 4: Simplify right side
    187,660.78x = 36,954,184,924.47
  5. Step 5: Solve for x
    x = 36,954,184,924.47/187,660.78
  6. Step 6: Final answer
    x = 196,920.13

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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.