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Finding the Fourth Proportional to 268,840.80, 402,872.40 and 118,958.40

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Solution

The fourth proportional to 268,840.80, 402,872.40 and 118,958.40 is: 178,265.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,840.80 : 402,872.40 = 118,958.40 : x
  2. Step 2: Convert to fraction form
    268,840.80/402,872.40 = 118,958.40/x
  3. Step 3: Cross multiply
    268,840.80x = 402,872.40 × 118,958.40
  4. Step 4: Simplify right side
    268,840.80x = 47,925,056,108.16
  5. Step 5: Solve for x
    x = 47,925,056,108.16/268,840.80
  6. Step 6: Final answer
    x = 178,265.56

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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.