Home / 81,165.76-112,080-51,003.36

Finding the Fourth Proportional to 81,165.76, 112,080 and 51,003.36

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Solution

The fourth proportional to 81,165.76, 112,080 and 51,003.36 is: 70,429.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,165.76 : 112,080 = 51,003.36 : x
  2. Step 2: Convert to fraction form
    81,165.76/112,080 = 51,003.36/x
  3. Step 3: Cross multiply
    81,165.76x = 112,080 × 51,003.36
  4. Step 4: Simplify right side
    81,165.76x = 5,716,456,588.80
  5. Step 5: Solve for x
    x = 5,716,456,588.80/81,165.76
  6. Step 6: Final answer
    x = 70,429.41

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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.