Home / 115,725.20-159,698.64-65,424.16

Finding the Fourth Proportional to 115,725.20, 159,698.64 and 65,424.16

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Solution

The fourth proportional to 115,725.20, 159,698.64 and 65,424.16 is: 90,284.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,725.20 : 159,698.64 = 65,424.16 : x
  2. Step 2: Convert to fraction form
    115,725.20/159,698.64 = 65,424.16/x
  3. Step 3: Cross multiply
    115,725.20x = 159,698.64 × 65,424.16
  4. Step 4: Simplify right side
    115,725.20x = 10,448,149,375.14
  5. Step 5: Solve for x
    x = 10,448,149,375.14/115,725.20
  6. Step 6: Final answer
    x = 90,284.13

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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.