Home / 129,464.28-178,636.86-72,863.64

Finding the Fourth Proportional to 129,464.28, 178,636.86 and 72,863.64

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Solution

The fourth proportional to 129,464.28, 178,636.86 and 72,863.64 is: 100,538.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,464.28 : 178,636.86 = 72,863.64 : x
  2. Step 2: Convert to fraction form
    129,464.28/178,636.86 = 72,863.64/x
  3. Step 3: Cross multiply
    129,464.28x = 178,636.86 × 72,863.64
  4. Step 4: Simplify right side
    129,464.28x = 13,016,131,857.77
  5. Step 5: Solve for x
    x = 13,016,131,857.77/129,464.28
  6. Step 6: Final answer
    x = 100,538.40

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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.