Home / 218,318.72-301,279.78-121,520.49

Finding the Fourth Proportional to 218,318.72, 301,279.78 and 121,520.49

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Solution

The fourth proportional to 218,318.72, 301,279.78 and 121,520.49 is: 167,698.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,318.72 : 301,279.78 = 121,520.49 : x
  2. Step 2: Convert to fraction form
    218,318.72/301,279.78 = 121,520.49/x
  3. Step 3: Cross multiply
    218,318.72x = 301,279.78 × 121,520.49
  4. Step 4: Simplify right side
    218,318.72x = 36,611,666,492.69
  5. Step 5: Solve for x
    x = 36,611,666,492.69/218,318.72
  6. Step 6: Final answer
    x = 167,698.25

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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.