Home / 280,006.40-419,740.80-92,921.60

Finding the Fourth Proportional to 280,006.40, 419,740.80 and 92,921.60

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Solution

The fourth proportional to 280,006.40, 419,740.80 and 92,921.60 is: 139,293.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,006.40 : 419,740.80 = 92,921.60 : x
  2. Step 2: Convert to fraction form
    280,006.40/419,740.80 = 92,921.60/x
  3. Step 3: Cross multiply
    280,006.40x = 419,740.80 × 92,921.60
  4. Step 4: Simplify right side
    280,006.40x = 39,002,986,721.28
  5. Step 5: Solve for x
    x = 39,002,986,721.28/280,006.40
  6. Step 6: Final answer
    x = 139,293.20

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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.