Home / 129,262.12-178,256.48-86,243.38

Finding the Fourth Proportional to 129,262.12, 178,256.48 and 86,243.38

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Solution

The fourth proportional to 129,262.12, 178,256.48 and 86,243.38 is: 118,932.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,262.12 : 178,256.48 = 86,243.38 : x
  2. Step 2: Convert to fraction form
    129,262.12/178,256.48 = 86,243.38/x
  3. Step 3: Cross multiply
    129,262.12x = 178,256.48 × 86,243.38
  4. Step 4: Simplify right side
    129,262.12x = 15,373,441,342.10
  5. Step 5: Solve for x
    x = 15,373,441,342.10/129,262.12
  6. Step 6: Final answer
    x = 118,932.30

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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.