Home / 138,109.53-190,589.27-77,680.16

Finding the Fourth Proportional to 138,109.53, 190,589.27 and 77,680.16

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Solution

The fourth proportional to 138,109.53, 190,589.27 and 77,680.16 is: 107,197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,109.53 : 190,589.27 = 77,680.16 : x
  2. Step 2: Convert to fraction form
    138,109.53/190,589.27 = 77,680.16/x
  3. Step 3: Cross multiply
    138,109.53x = 190,589.27 × 77,680.16
  4. Step 4: Simplify right side
    138,109.53x = 14,805,003,646.54
  5. Step 5: Solve for x
    x = 14,805,003,646.54/138,109.53
  6. Step 6: Final answer
    x = 107,197.55

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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.