Home / 155,621.70-214,755.12-87,638.40

Finding the Fourth Proportional to 155,621.70, 214,755.12 and 87,638.40

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Solution

The fourth proportional to 155,621.70, 214,755.12 and 87,638.40 is: 120,939.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,621.70 : 214,755.12 = 87,638.40 : x
  2. Step 2: Convert to fraction form
    155,621.70/214,755.12 = 87,638.40/x
  3. Step 3: Cross multiply
    155,621.70x = 214,755.12 × 87,638.40
  4. Step 4: Simplify right side
    155,621.70x = 18,820,795,108.61
  5. Step 5: Solve for x
    x = 18,820,795,108.61/155,621.70
  6. Step 6: Final answer
    x = 120,939.40

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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.