Home / 122,990.35-169,728.06-71,991.94

Finding the Fourth Proportional to 122,990.35, 169,728.06 and 71,991.94

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Solution

The fourth proportional to 122,990.35, 169,728.06 and 71,991.94 is: 99,349.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,990.35 : 169,728.06 = 71,991.94 : x
  2. Step 2: Convert to fraction form
    122,990.35/169,728.06 = 71,991.94/x
  3. Step 3: Cross multiply
    122,990.35x = 169,728.06 × 71,991.94
  4. Step 4: Simplify right side
    122,990.35x = 12,219,052,311.84
  5. Step 5: Solve for x
    x = 12,219,052,311.84/122,990.35
  6. Step 6: Final answer
    x = 99,349.68

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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.