Home / 129,197.17-178,346.78-121,126.33

Finding the Fourth Proportional to 129,197.17, 178,346.78 and 121,126.33

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Solution

The fourth proportional to 129,197.17, 178,346.78 and 121,126.33 is: 167,205.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,197.17 : 178,346.78 = 121,126.33 : x
  2. Step 2: Convert to fraction form
    129,197.17/178,346.78 = 121,126.33/x
  3. Step 3: Cross multiply
    129,197.17x = 178,346.78 × 121,126.33
  4. Step 4: Simplify right side
    129,197.17x = 21,602,490,928.72
  5. Step 5: Solve for x
    x = 21,602,490,928.72/129,197.17
  6. Step 6: Final answer
    x = 167,205.60

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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.