Home / 207,921.48-311,830.22-81,587.40

Finding the Fourth Proportional to 207,921.48, 311,830.22 and 81,587.40

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Solution

The fourth proportional to 207,921.48, 311,830.22 and 81,587.40 is: 122,360.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,921.48 : 311,830.22 = 81,587.40 : x
  2. Step 2: Convert to fraction form
    207,921.48/311,830.22 = 81,587.40/x
  3. Step 3: Cross multiply
    207,921.48x = 311,830.22 × 81,587.40
  4. Step 4: Simplify right side
    207,921.48x = 25,441,416,891.23
  5. Step 5: Solve for x
    x = 25,441,416,891.23/207,921.48
  6. Step 6: Final answer
    x = 122,360.70

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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.