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Finding the Fourth Proportional to 219,329.94, 302,657.09 and 128,676.42

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Solution

The fourth proportional to 219,329.94, 302,657.09 and 128,676.42 is: 177,562.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,329.94 : 302,657.09 = 128,676.42 : x
  2. Step 2: Convert to fraction form
    219,329.94/302,657.09 = 128,676.42/x
  3. Step 3: Cross multiply
    219,329.94x = 302,657.09 × 128,676.42
  4. Step 4: Simplify right side
    219,329.94x = 38,944,830,828.82
  5. Step 5: Solve for x
    x = 38,944,830,828.82/219,329.94
  6. Step 6: Final answer
    x = 177,562.77

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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.