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Finding the Fourth Proportional to 218,999.50, 302,212.72 and 122,205.92

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Solution

The fourth proportional to 218,999.50, 302,212.72 and 122,205.92 is: 168,640.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,999.50 : 302,212.72 = 122,205.92 : x
  2. Step 2: Convert to fraction form
    218,999.50/302,212.72 = 122,205.92/x
  3. Step 3: Cross multiply
    218,999.50x = 302,212.72 × 122,205.92
  4. Step 4: Simplify right side
    218,999.50x = 36,932,182,125.00
  5. Step 5: Solve for x
    x = 36,932,182,125.00/218,999.50
  6. Step 6: Final answer
    x = 168,640.49

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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.