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Finding the Fourth Proportional to 127,851.80, 191,777.70 and 115,410.20

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Solution

The fourth proportional to 127,851.80, 191,777.70 and 115,410.20 is: 173,115.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,851.80 : 191,777.70 = 115,410.20 : x
  2. Step 2: Convert to fraction form
    127,851.80/191,777.70 = 115,410.20/x
  3. Step 3: Cross multiply
    127,851.80x = 191,777.70 × 115,410.20
  4. Step 4: Simplify right side
    127,851.80x = 22,133,102,712.54
  5. Step 5: Solve for x
    x = 22,133,102,712.54/127,851.80
  6. Step 6: Final answer
    x = 173,115.30

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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.