Home / 78,721.07-108,568.15-53,220.65

Finding the Fourth Proportional to 78,721.07, 108,568.15 and 53,220.65

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Solution

The fourth proportional to 78,721.07, 108,568.15 and 53,220.65 is: 73,399.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,721.07 : 108,568.15 = 53,220.65 : x
  2. Step 2: Convert to fraction form
    78,721.07/108,568.15 = 53,220.65/x
  3. Step 3: Cross multiply
    78,721.07x = 108,568.15 × 53,220.65
  4. Step 4: Simplify right side
    78,721.07x = 5,778,066,836.41
  5. Step 5: Solve for x
    x = 5,778,066,836.41/78,721.07
  6. Step 6: Final answer
    x = 73,399.25

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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.