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Finding the Fourth Proportional to 280,610.80, 420,639.12 and 112,029.56

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Solution

The fourth proportional to 280,610.80, 420,639.12 and 112,029.56 is: 167,933.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,610.80 : 420,639.12 = 112,029.56 : x
  2. Step 2: Convert to fraction form
    280,610.80/420,639.12 = 112,029.56/x
  3. Step 3: Cross multiply
    280,610.80x = 420,639.12 × 112,029.56
  4. Step 4: Simplify right side
    280,610.80x = 47,124,015,532.39
  5. Step 5: Solve for x
    x = 47,124,015,532.39/280,610.80
  6. Step 6: Final answer
    x = 167,933.72

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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.