Home / 115,972.81-159,947.57-81,631.22

Finding the Fourth Proportional to 115,972.81, 159,947.57 and 81,631.22

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Solution

The fourth proportional to 115,972.81, 159,947.57 and 81,631.22 is: 112,584.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,972.81 : 159,947.57 = 81,631.22 : x
  2. Step 2: Convert to fraction form
    115,972.81/159,947.57 = 81,631.22/x
  3. Step 3: Cross multiply
    115,972.81x = 159,947.57 × 81,631.22
  4. Step 4: Simplify right side
    115,972.81x = 13,056,715,275.14
  5. Step 5: Solve for x
    x = 13,056,715,275.14/115,972.81
  6. Step 6: Final answer
    x = 112,584.28

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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.