Home / 145,021.71-217,523.79-86,231.51

Finding the Fourth Proportional to 145,021.71, 217,523.79 and 86,231.51

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Solution

The fourth proportional to 145,021.71, 217,523.79 and 86,231.51 is: 129,342.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,021.71 : 217,523.79 = 86,231.51 : x
  2. Step 2: Convert to fraction form
    145,021.71/217,523.79 = 86,231.51/x
  3. Step 3: Cross multiply
    145,021.71x = 217,523.79 × 86,231.51
  4. Step 4: Simplify right side
    145,021.71x = 18,757,403,785.00
  5. Step 5: Solve for x
    x = 18,757,403,785.00/145,021.71
  6. Step 6: Final answer
    x = 129,342.04

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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.