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Finding the Fourth Proportional to 219,424.36, 302,789.76 and 128,783.92

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Solution

The fourth proportional to 219,424.36, 302,789.76 and 128,783.92 is: 177,712.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,424.36 : 302,789.76 = 128,783.92 : x
  2. Step 2: Convert to fraction form
    219,424.36/302,789.76 = 128,783.92/x
  3. Step 3: Cross multiply
    219,424.36x = 302,789.76 × 128,783.92
  4. Step 4: Simplify right side
    219,424.36x = 38,994,452,228.66
  5. Step 5: Solve for x
    x = 38,994,452,228.66/219,424.36
  6. Step 6: Final answer
    x = 177,712.50

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.