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Finding the Fourth Proportional to 127,997.80, 191,996.70 and 87,908.20

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Solution

The fourth proportional to 127,997.80, 191,996.70 and 87,908.20 is: 131,862.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,997.80 : 191,996.70 = 87,908.20 : x
  2. Step 2: Convert to fraction form
    127,997.80/191,996.70 = 87,908.20/x
  3. Step 3: Cross multiply
    127,997.80x = 191,996.70 × 87,908.20
  4. Step 4: Simplify right side
    127,997.80x = 16,878,084,302.94
  5. Step 5: Solve for x
    x = 16,878,084,302.94/127,997.80
  6. Step 6: Final answer
    x = 131,862.30

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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.