Home / 138,592.99-191,257.39-78,164.15

Finding the Fourth Proportional to 138,592.99, 191,257.39 and 78,164.15

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Solution

The fourth proportional to 138,592.99, 191,257.39 and 78,164.15 is: 107,866.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,592.99 : 191,257.39 = 78,164.15 : x
  2. Step 2: Convert to fraction form
    138,592.99/191,257.39 = 78,164.15/x
  3. Step 3: Cross multiply
    138,592.99x = 191,257.39 × 78,164.15
  4. Step 4: Simplify right side
    138,592.99x = 14,949,471,320.57
  5. Step 5: Solve for x
    x = 14,949,471,320.57/138,592.99
  6. Step 6: Final answer
    x = 107,866.00

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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.