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Finding the Fourth Proportional to 219,374.97, 302,739.48 and 128,732.46

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Solution

The fourth proportional to 219,374.97, 302,739.48 and 128,732.46 is: 177,651.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,374.97 : 302,739.48 = 128,732.46 : x
  2. Step 2: Convert to fraction form
    219,374.97/302,739.48 = 128,732.46/x
  3. Step 3: Cross multiply
    219,374.97x = 302,739.48 × 128,732.46
  4. Step 4: Simplify right side
    219,374.97x = 38,972,397,999.52
  5. Step 5: Solve for x
    x = 38,972,397,999.52/219,374.97
  6. Step 6: Final answer
    x = 177,651.98

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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.