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Finding the Fourth Proportional to 253,986.12, 380,999.88 and 127,561.32

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Solution

The fourth proportional to 253,986.12, 380,999.88 and 127,561.32 is: 191,352.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,986.12 : 380,999.88 = 127,561.32 : x
  2. Step 2: Convert to fraction form
    253,986.12/380,999.88 = 127,561.32/x
  3. Step 3: Cross multiply
    253,986.12x = 380,999.88 × 127,561.32
  4. Step 4: Simplify right side
    253,986.12x = 48,600,847,612.64
  5. Step 5: Solve for x
    x = 48,600,847,612.64/253,986.12
  6. Step 6: Final answer
    x = 191,352.38

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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.