Home / 138,431.75-191,078.02-80,303.16

Finding the Fourth Proportional to 138,431.75, 191,078.02 and 80,303.16

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Solution

The fourth proportional to 138,431.75, 191,078.02 and 80,303.16 is: 110,842.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,431.75 : 191,078.02 = 80,303.16 : x
  2. Step 2: Convert to fraction form
    138,431.75/191,078.02 = 80,303.16/x
  3. Step 3: Cross multiply
    138,431.75x = 191,078.02 × 80,303.16
  4. Step 4: Simplify right side
    138,431.75x = 15,344,169,629.46
  5. Step 5: Solve for x
    x = 15,344,169,629.46/138,431.75
  6. Step 6: Final answer
    x = 110,842.85

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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.