Home / 138,945.40-191,754.24-84,518.80

Finding the Fourth Proportional to 138,945.40, 191,754.24 and 84,518.80

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Solution

The fourth proportional to 138,945.40, 191,754.24 and 84,518.80 is: 116,641.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,945.40 : 191,754.24 = 84,518.80 : x
  2. Step 2: Convert to fraction form
    138,945.40/191,754.24 = 84,518.80/x
  3. Step 3: Cross multiply
    138,945.40x = 191,754.24 × 84,518.80
  4. Step 4: Simplify right side
    138,945.40x = 16,206,838,259.71
  5. Step 5: Solve for x
    x = 16,206,838,259.71/138,945.40
  6. Step 6: Final answer
    x = 116,641.78

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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.