Home / 131,139.23-196,376.66-81,316.62

Finding the Fourth Proportional to 131,139.23, 196,376.66 and 81,316.62

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Solution

The fourth proportional to 131,139.23, 196,376.66 and 81,316.62 is: 121,768.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,139.23 : 196,376.66 = 81,316.62 : x
  2. Step 2: Convert to fraction form
    131,139.23/196,376.66 = 81,316.62/x
  3. Step 3: Cross multiply
    131,139.23x = 196,376.66 × 81,316.62
  4. Step 4: Simplify right side
    131,139.23x = 15,968,685,831.51
  5. Step 5: Solve for x
    x = 15,968,685,831.51/131,139.23
  6. Step 6: Final answer
    x = 121,768.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.