Home / 79,121.79-109,185.35-45,141.28

Finding the Fourth Proportional to 79,121.79, 109,185.35 and 45,141.28

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Solution

The fourth proportional to 79,121.79, 109,185.35 and 45,141.28 is: 62,293.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,121.79 : 109,185.35 = 45,141.28 : x
  2. Step 2: Convert to fraction form
    79,121.79/109,185.35 = 45,141.28/x
  3. Step 3: Cross multiply
    79,121.79x = 109,185.35 × 45,141.28
  4. Step 4: Simplify right side
    79,121.79x = 4,928,765,957.58
  5. Step 5: Solve for x
    x = 4,928,765,957.58/79,121.79
  6. Step 6: Final answer
    x = 62,293.41

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1.5x scale

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.