Home / 251,631-347,253.21-138,456.18

Finding the Fourth Proportional to 251,631, 347,253.21 and 138,456.18

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Solution

The fourth proportional to 251,631, 347,253.21 and 138,456.18 is: 191,070.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,631 : 347,253.21 = 138,456.18 : x
  2. Step 2: Convert to fraction form
    251,631/347,253.21 = 138,456.18/x
  3. Step 3: Cross multiply
    251,631x = 347,253.21 × 138,456.18
  4. Step 4: Simplify right side
    251,631x = 48,079,352,949.34
  5. Step 5: Solve for x
    x = 48,079,352,949.34/251,631
  6. Step 6: Final answer
    x = 191,070.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.