Home / 217,865.12-300,647.32-121,068.65

Finding the Fourth Proportional to 217,865.12, 300,647.32 and 121,068.65

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Solution

The fourth proportional to 217,865.12, 300,647.32 and 121,068.65 is: 167,071.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,865.12 : 300,647.32 = 121,068.65 : x
  2. Step 2: Convert to fraction form
    217,865.12/300,647.32 = 121,068.65/x
  3. Step 3: Cross multiply
    217,865.12x = 300,647.32 × 121,068.65
  4. Step 4: Simplify right side
    217,865.12x = 36,398,964,553.17
  5. Step 5: Solve for x
    x = 36,398,964,553.17/217,865.12
  6. Step 6: Final answer
    x = 167,071.10

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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.