Home / 138,412.19-191,009.39-77,983.71

Finding the Fourth Proportional to 138,412.19, 191,009.39 and 77,983.71

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Solution

The fourth proportional to 138,412.19, 191,009.39 and 77,983.71 is: 107,617.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,412.19 : 191,009.39 = 77,983.71 : x
  2. Step 2: Convert to fraction form
    138,412.19/191,009.39 = 77,983.71/x
  3. Step 3: Cross multiply
    138,412.19x = 191,009.39 × 77,983.71
  4. Step 4: Simplify right side
    138,412.19x = 14,895,621,283.92
  5. Step 5: Solve for x
    x = 14,895,621,283.92/138,412.19
  6. Step 6: Final answer
    x = 107,617.84

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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.