Home / 157,721.85-217,661.31-86,105.70

Finding the Fourth Proportional to 157,721.85, 217,661.31 and 86,105.70

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Solution

The fourth proportional to 157,721.85, 217,661.31 and 86,105.70 is: 118,828.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,721.85 : 217,661.31 = 86,105.70 : x
  2. Step 2: Convert to fraction form
    157,721.85/217,661.31 = 86,105.70/x
  3. Step 3: Cross multiply
    157,721.85x = 217,661.31 × 86,105.70
  4. Step 4: Simplify right side
    157,721.85x = 18,741,879,460.47
  5. Step 5: Solve for x
    x = 18,741,879,460.47/157,721.85
  6. Step 6: Final answer
    x = 118,828.68

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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.