Home / 140,905.10-211,545.30-81,783.20

Finding the Fourth Proportional to 140,905.10, 211,545.30 and 81,783.20

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Solution

The fourth proportional to 140,905.10, 211,545.30 and 81,783.20 is: 122,783.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,905.10 : 211,545.30 = 81,783.20 : x
  2. Step 2: Convert to fraction form
    140,905.10/211,545.30 = 81,783.20/x
  3. Step 3: Cross multiply
    140,905.10x = 211,545.30 × 81,783.20
  4. Step 4: Simplify right side
    140,905.10x = 17,300,851,578.96
  5. Step 5: Solve for x
    x = 17,300,851,578.96/140,905.10
  6. Step 6: Final answer
    x = 122,783.71

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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.