Home / 84,130.72-126,218.76-27,979.90

Finding the Fourth Proportional to 84,130.72, 126,218.76 and 27,979.90

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Solution

The fourth proportional to 84,130.72, 126,218.76 and 27,979.90 is: 41,977.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,130.72 : 126,218.76 = 27,979.90 : x
  2. Step 2: Convert to fraction form
    84,130.72/126,218.76 = 27,979.90/x
  3. Step 3: Cross multiply
    84,130.72x = 126,218.76 × 27,979.90
  4. Step 4: Simplify right side
    84,130.72x = 3,531,588,282.92
  5. Step 5: Solve for x
    x = 3,531,588,282.92/84,130.72
  6. Step 6: Final answer
    x = 41,977.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.