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Finding the Fourth Proportional to 217,851.83, 300,663.71 and 122,358.52

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Solution

The fourth proportional to 217,851.83, 300,663.71 and 122,358.52 is: 168,870.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,851.83 : 300,663.71 = 122,358.52 : x
  2. Step 2: Convert to fraction form
    217,851.83/300,663.71 = 122,358.52/x
  3. Step 3: Cross multiply
    217,851.83x = 300,663.71 × 122,358.52
  4. Step 4: Simplify right side
    217,851.83x = 36,788,765,821.65
  5. Step 5: Solve for x
    x = 36,788,765,821.65/217,851.83
  6. Step 6: Final answer
    x = 168,870.59

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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.