Home / 138,658.43-191,336.88-77,399.04

Finding the Fourth Proportional to 138,658.43, 191,336.88 and 77,399.04

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Solution

The fourth proportional to 138,658.43, 191,336.88 and 77,399.04 is: 106,804.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,658.43 : 191,336.88 = 77,399.04 : x
  2. Step 2: Convert to fraction form
    138,658.43/191,336.88 = 77,399.04/x
  3. Step 3: Cross multiply
    138,658.43x = 191,336.88 × 77,399.04
  4. Step 4: Simplify right side
    138,658.43x = 14,809,291,836.35
  5. Step 5: Solve for x
    x = 14,809,291,836.35/138,658.43
  6. Step 6: Final answer
    x = 106,804.12

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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.