Home / 129,250.27-178,501.35-115,161.40

Finding the Fourth Proportional to 129,250.27, 178,501.35 and 115,161.40

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Solution

The fourth proportional to 129,250.27, 178,501.35 and 115,161.40 is: 159,043.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,250.27 : 178,501.35 = 115,161.40 : x
  2. Step 2: Convert to fraction form
    129,250.27/178,501.35 = 115,161.40/x
  3. Step 3: Cross multiply
    129,250.27x = 178,501.35 × 115,161.40
  4. Step 4: Simplify right side
    129,250.27x = 20,556,465,367.89
  5. Step 5: Solve for x
    x = 20,556,465,367.89/129,250.27
  6. Step 6: Final answer
    x = 159,043.89

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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.