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Finding the Fourth Proportional to 280,068.88, 420,103.56 and 120,040.96

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Solution

The fourth proportional to 280,068.88, 420,103.56 and 120,040.96 is: 180,061.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,068.88 : 420,103.56 = 120,040.96 : x
  2. Step 2: Convert to fraction form
    280,068.88/420,103.56 = 120,040.96/x
  3. Step 3: Cross multiply
    280,068.88x = 420,103.56 × 120,040.96
  4. Step 4: Simplify right side
    280,068.88x = 50,429,634,566.84
  5. Step 5: Solve for x
    x = 50,429,634,566.84/280,068.88
  6. Step 6: Final answer
    x = 180,061.55

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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.