Home / 280,135.20-420,206.40-93,146.72

Finding the Fourth Proportional to 280,135.20, 420,206.40 and 93,146.72

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Solution

The fourth proportional to 280,135.20, 420,206.40 and 93,146.72 is: 139,721.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,135.20 : 420,206.40 = 93,146.72 : x
  2. Step 2: Convert to fraction form
    280,135.20/420,206.40 = 93,146.72/x
  3. Step 3: Cross multiply
    280,135.20x = 420,206.40 × 93,146.72
  4. Step 4: Simplify right side
    280,135.20x = 39,140,847,883.01
  5. Step 5: Solve for x
    x = 39,140,847,883.01/280,135.20
  6. Step 6: Final answer
    x = 139,721.28

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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.