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Finding the Fourth Proportional to 154,074.30, 231,111.45 and 84,090.30

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Solution

The fourth proportional to 154,074.30, 231,111.45 and 84,090.30 is: 126,135.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,074.30 : 231,111.45 = 84,090.30 : x
  2. Step 2: Convert to fraction form
    154,074.30/231,111.45 = 84,090.30/x
  3. Step 3: Cross multiply
    154,074.30x = 231,111.45 × 84,090.30
  4. Step 4: Simplify right side
    154,074.30x = 19,434,231,163.94
  5. Step 5: Solve for x
    x = 19,434,231,163.94/154,074.30
  6. Step 6: Final answer
    x = 126,135.45

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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.