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Finding the Fourth Proportional to 138,495.94, 191,081.91 and 84,724.90

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Solution

The fourth proportional to 138,495.94, 191,081.91 and 84,724.90 is: 116,894.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,495.94 : 191,081.91 = 84,724.90 : x
  2. Step 2: Convert to fraction form
    138,495.94/191,081.91 = 84,724.90/x
  3. Step 3: Cross multiply
    138,495.94x = 191,081.91 × 84,724.90
  4. Step 4: Simplify right side
    138,495.94x = 16,189,395,716.56
  5. Step 5: Solve for x
    x = 16,189,395,716.56/138,495.94
  6. Step 6: Final answer
    x = 116,894.37

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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.