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Finding the Fourth Proportional to 219,358.40, 302,720.79 and 123,879.44

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Solution

The fourth proportional to 219,358.40, 302,720.79 and 123,879.44 is: 170,957.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,358.40 : 302,720.79 = 123,879.44 : x
  2. Step 2: Convert to fraction form
    219,358.40/302,720.79 = 123,879.44/x
  3. Step 3: Cross multiply
    219,358.40x = 302,720.79 × 123,879.44
  4. Step 4: Simplify right side
    219,358.40x = 37,500,883,162.91
  5. Step 5: Solve for x
    x = 37,500,883,162.91/219,358.40
  6. Step 6: Final answer
    x = 170,957.14

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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.