Home / 155,279.30-214,280.43-87,299.13

Finding the Fourth Proportional to 155,279.30, 214,280.43 and 87,299.13

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Solution

The fourth proportional to 155,279.30, 214,280.43 and 87,299.13 is: 120,469.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,279.30 : 214,280.43 = 87,299.13 : x
  2. Step 2: Convert to fraction form
    155,279.30/214,280.43 = 87,299.13/x
  3. Step 3: Cross multiply
    155,279.30x = 214,280.43 × 87,299.13
  4. Step 4: Simplify right side
    155,279.30x = 18,706,494,043.62
  5. Step 5: Solve for x
    x = 18,706,494,043.62/155,279.30
  6. Step 6: Final answer
    x = 120,469.98

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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.