Home / 131,736.87-181,901.70-121,661.64

Finding the Fourth Proportional to 131,736.87, 181,901.70 and 121,661.64

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Solution

The fourth proportional to 131,736.87, 181,901.70 and 121,661.64 is: 167,989.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,736.87 : 181,901.70 = 121,661.64 : x
  2. Step 2: Convert to fraction form
    131,736.87/181,901.70 = 121,661.64/x
  3. Step 3: Cross multiply
    131,736.87x = 181,901.70 × 121,661.64
  4. Step 4: Simplify right side
    131,736.87x = 22,130,459,140.79
  5. Step 5: Solve for x
    x = 22,130,459,140.79/131,736.87
  6. Step 6: Final answer
    x = 167,989.87

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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.