Home / 138,144.96-190,570.26-80,746.79

Finding the Fourth Proportional to 138,144.96, 190,570.26 and 80,746.79

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Solution

The fourth proportional to 138,144.96, 190,570.26 and 80,746.79 is: 111,389.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,144.96 : 190,570.26 = 80,746.79 : x
  2. Step 2: Convert to fraction form
    138,144.96/190,570.26 = 80,746.79/x
  3. Step 3: Cross multiply
    138,144.96x = 190,570.26 × 80,746.79
  4. Step 4: Simplify right side
    138,144.96x = 15,387,935,811.61
  5. Step 5: Solve for x
    x = 15,387,935,811.61/138,144.96
  6. Step 6: Final answer
    x = 111,389.77

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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.