Home / 129,679.36-178,955.04-73,089.60

Finding the Fourth Proportional to 129,679.36, 178,955.04 and 73,089.60

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Solution

The fourth proportional to 129,679.36, 178,955.04 and 73,089.60 is: 100,862.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,679.36 : 178,955.04 = 73,089.60 : x
  2. Step 2: Convert to fraction form
    129,679.36/178,955.04 = 73,089.60/x
  3. Step 3: Cross multiply
    129,679.36x = 178,955.04 × 73,089.60
  4. Step 4: Simplify right side
    129,679.36x = 13,079,752,291.58
  5. Step 5: Solve for x
    x = 13,079,752,291.58/129,679.36
  6. Step 6: Final answer
    x = 100,862.25

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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.