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Finding the Fourth Proportional to 187,665.78, 280,792.40 and 131,615.30

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Solution

The fourth proportional to 187,665.78, 280,792.40 and 131,615.30 is: 196,927.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,665.78 : 280,792.40 = 131,615.30 : x
  2. Step 2: Convert to fraction form
    187,665.78/280,792.40 = 131,615.30/x
  3. Step 3: Cross multiply
    187,665.78x = 280,792.40 × 131,615.30
  4. Step 4: Simplify right side
    187,665.78x = 36,956,575,963.72
  5. Step 5: Solve for x
    x = 36,956,575,963.72/187,665.78
  6. Step 6: Final answer
    x = 196,927.62

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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.