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Finding the Fourth Proportional to 138,495.69, 191,081.57 and 84,724.65

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Solution

The fourth proportional to 138,495.69, 191,081.57 and 84,724.65 is: 116,894.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,495.69 : 191,081.57 = 84,724.65 : x
  2. Step 2: Convert to fraction form
    138,495.69/191,081.57 = 84,724.65/x
  3. Step 3: Cross multiply
    138,495.69x = 191,081.57 × 84,724.65
  4. Step 4: Simplify right side
    138,495.69x = 16,189,318,716.08
  5. Step 5: Solve for x
    x = 16,189,318,716.08/138,495.69
  6. Step 6: Final answer
    x = 116,894.03

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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.