Home / 143,143.20-214,714.80-139,862.70

Finding the Fourth Proportional to 143,143.20, 214,714.80 and 139,862.70

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Solution

The fourth proportional to 143,143.20, 214,714.80 and 139,862.70 is: 209,794.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,143.20 : 214,714.80 = 139,862.70 : x
  2. Step 2: Convert to fraction form
    143,143.20/214,714.80 = 139,862.70/x
  3. Step 3: Cross multiply
    143,143.20x = 214,714.80 × 139,862.70
  4. Step 4: Simplify right side
    143,143.20x = 30,030,591,657.96
  5. Step 5: Solve for x
    x = 30,030,591,657.96/143,143.20
  6. Step 6: Final answer
    x = 209,794.05

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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.