Home / 122,991.42-169,670.16-71,972.58

Finding the Fourth Proportional to 122,991.42, 169,670.16 and 71,972.58

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Solution

The fourth proportional to 122,991.42, 169,670.16 and 71,972.58 is: 99,288.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,991.42 : 169,670.16 = 71,972.58 : x
  2. Step 2: Convert to fraction form
    122,991.42/169,670.16 = 71,972.58/x
  3. Step 3: Cross multiply
    122,991.42x = 169,670.16 × 71,972.58
  4. Step 4: Simplify right side
    122,991.42x = 12,211,599,164.21
  5. Step 5: Solve for x
    x = 12,211,599,164.21/122,991.42
  6. Step 6: Final answer
    x = 99,288.22

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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.