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Finding the Fourth Proportional to 229,121.70, 343,712.70 and 85,007.89

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Solution

The fourth proportional to 229,121.70, 343,712.70 and 85,007.89 is: 127,523.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,121.70 : 343,712.70 = 85,007.89 : x
  2. Step 2: Convert to fraction form
    229,121.70/343,712.70 = 85,007.89/x
  3. Step 3: Cross multiply
    229,121.70x = 343,712.70 × 85,007.89
  4. Step 4: Simplify right side
    229,121.70x = 29,218,291,393.20
  5. Step 5: Solve for x
    x = 29,218,291,393.20/229,121.70
  6. Step 6: Final answer
    x = 127,523.02

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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.