Home / 205,372.18-307,357.35-172,129.78

Finding the Fourth Proportional to 205,372.18, 307,357.35 and 172,129.78

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Solution

The fourth proportional to 205,372.18, 307,357.35 and 172,129.78 is: 257,607.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,372.18 : 307,357.35 = 172,129.78 : x
  2. Step 2: Convert to fraction form
    205,372.18/307,357.35 = 172,129.78/x
  3. Step 3: Cross multiply
    205,372.18x = 307,357.35 × 172,129.78
  4. Step 4: Simplify right side
    205,372.18x = 52,905,353,036.88
  5. Step 5: Solve for x
    x = 52,905,353,036.88/205,372.18
  6. Step 6: Final answer
    x = 257,607.20

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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.