Home / 129,276.19-178,387.54-71,906.19

Finding the Fourth Proportional to 129,276.19, 178,387.54 and 71,906.19

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Solution

The fourth proportional to 129,276.19, 178,387.54 and 71,906.19 is: 99,222.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,276.19 : 178,387.54 = 71,906.19 : x
  2. Step 2: Convert to fraction form
    129,276.19/178,387.54 = 71,906.19/x
  3. Step 3: Cross multiply
    129,276.19x = 178,387.54 × 71,906.19
  4. Step 4: Simplify right side
    129,276.19x = 12,827,168,344.87
  5. Step 5: Solve for x
    x = 12,827,168,344.87/129,276.19
  6. Step 6: Final answer
    x = 99,222.98

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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.