Home / 131,696-181,741.76-72,081.28

Finding the Fourth Proportional to 131,696, 181,741.76 and 72,081.28

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Solution

The fourth proportional to 131,696, 181,741.76 and 72,081.28 is: 99,472.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,696 : 181,741.76 = 72,081.28 : x
  2. Step 2: Convert to fraction form
    131,696/181,741.76 = 72,081.28/x
  3. Step 3: Cross multiply
    131,696x = 181,741.76 × 72,081.28
  4. Step 4: Simplify right side
    131,696x = 13,100,178,690.25
  5. Step 5: Solve for x
    x = 13,100,178,690.25/131,696
  6. Step 6: Final answer
    x = 99,472.87

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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.