Home / 129,707.12-178,995.72-70,091.12

Finding the Fourth Proportional to 129,707.12, 178,995.72 and 70,091.12

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Solution

The fourth proportional to 129,707.12, 178,995.72 and 70,091.12 is: 96,725.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,707.12 : 178,995.72 = 70,091.12 : x
  2. Step 2: Convert to fraction form
    129,707.12/178,995.72 = 70,091.12/x
  3. Step 3: Cross multiply
    129,707.12x = 178,995.72 × 70,091.12
  4. Step 4: Simplify right side
    129,707.12x = 12,546,010,490.01
  5. Step 5: Solve for x
    x = 12,546,010,490.01/129,707.12
  6. Step 6: Final answer
    x = 96,725.69

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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.