Home / 103,712.72-143,080.98-76,921.16

Finding the Fourth Proportional to 103,712.72, 143,080.98 and 76,921.16

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Solution

The fourth proportional to 103,712.72, 143,080.98 and 76,921.16 is: 106,119.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,712.72 : 143,080.98 = 76,921.16 : x
  2. Step 2: Convert to fraction form
    103,712.72/143,080.98 = 76,921.16/x
  3. Step 3: Cross multiply
    103,712.72x = 143,080.98 × 76,921.16
  4. Step 4: Simplify right side
    103,712.72x = 11,005,954,955.54
  5. Step 5: Solve for x
    x = 11,005,954,955.54/103,712.72
  6. Step 6: Final answer
    x = 106,119.63

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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.