Home / 129,504.12-178,722.06-72,921.72

Finding the Fourth Proportional to 129,504.12, 178,722.06 and 72,921.72

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Solution

The fourth proportional to 129,504.12, 178,722.06 and 72,921.72 is: 100,635.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,504.12 : 178,722.06 = 72,921.72 : x
  2. Step 2: Convert to fraction form
    129,504.12/178,722.06 = 72,921.72/x
  3. Step 3: Cross multiply
    129,504.12x = 178,722.06 × 72,921.72
  4. Step 4: Simplify right side
    129,504.12x = 13,032,720,017.14
  5. Step 5: Solve for x
    x = 13,032,720,017.14/129,504.12
  6. Step 6: Final answer
    x = 100,635.56

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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.