Home / 155,418.54-214,472.78-87,439.30

Finding the Fourth Proportional to 155,418.54, 214,472.78 and 87,439.30

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Solution

The fourth proportional to 155,418.54, 214,472.78 and 87,439.30 is: 120,663.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,418.54 : 214,472.78 = 87,439.30 : x
  2. Step 2: Convert to fraction form
    155,418.54/214,472.78 = 87,439.30/x
  3. Step 3: Cross multiply
    155,418.54x = 214,472.78 × 87,439.30
  4. Step 4: Simplify right side
    155,418.54x = 18,753,349,752.25
  5. Step 5: Solve for x
    x = 18,753,349,752.25/155,418.54
  6. Step 6: Final answer
    x = 120,663.53

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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.