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Finding the Fourth Proportional to 219,495.38, 302,897.42 and 128,849.90

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Solution

The fourth proportional to 219,495.38, 302,897.42 and 128,849.90 is: 177,809.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,495.38 : 302,897.42 = 128,849.90 : x
  2. Step 2: Convert to fraction form
    219,495.38/302,897.42 = 128,849.90/x
  3. Step 3: Cross multiply
    219,495.38x = 302,897.42 × 128,849.90
  4. Step 4: Simplify right side
    219,495.38x = 39,028,300,118.52
  5. Step 5: Solve for x
    x = 39,028,300,118.52/219,495.38
  6. Step 6: Final answer
    x = 177,809.21

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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.