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Finding the Fourth Proportional to 280,060.80, 420,117.36 and 111,540.48

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Solution

The fourth proportional to 280,060.80, 420,117.36 and 111,540.48 is: 167,321.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,060.80 : 420,117.36 = 111,540.48 : x
  2. Step 2: Convert to fraction form
    280,060.80/420,117.36 = 111,540.48/x
  3. Step 3: Cross multiply
    280,060.80x = 420,117.36 × 111,540.48
  4. Step 4: Simplify right side
    280,060.80x = 46,860,091,990.73
  5. Step 5: Solve for x
    x = 46,860,091,990.73/280,060.80
  6. Step 6: Final answer
    x = 167,321.14

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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.