Home / 115,234.20-172,980.90-68,513.40

Finding the Fourth Proportional to 115,234.20, 172,980.90 and 68,513.40

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Solution

The fourth proportional to 115,234.20, 172,980.90 and 68,513.40 is: 102,847.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,234.20 : 172,980.90 = 68,513.40 : x
  2. Step 2: Convert to fraction form
    115,234.20/172,980.90 = 68,513.40/x
  3. Step 3: Cross multiply
    115,234.20x = 172,980.90 × 68,513.40
  4. Step 4: Simplify right side
    115,234.20x = 11,851,509,594.06
  5. Step 5: Solve for x
    x = 11,851,509,594.06/115,234.20
  6. Step 6: Final answer
    x = 102,847.15

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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.