Home / 157,390.09-217,231.86-103,679.80

Finding the Fourth Proportional to 157,390.09, 217,231.86 and 103,679.80

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Solution

The fourth proportional to 157,390.09, 217,231.86 and 103,679.80 is: 143,100.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,390.09 : 217,231.86 = 103,679.80 : x
  2. Step 2: Convert to fraction form
    157,390.09/217,231.86 = 103,679.80/x
  3. Step 3: Cross multiply
    157,390.09x = 217,231.86 × 103,679.80
  4. Step 4: Simplify right side
    157,390.09x = 22,522,555,798.43
  5. Step 5: Solve for x
    x = 22,522,555,798.43/157,390.09
  6. Step 6: Final answer
    x = 143,100.22

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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.