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Finding the Fourth Proportional to 219,372, 329,058.05 and 79,130.61

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Solution

The fourth proportional to 219,372, 329,058.05 and 79,130.61 is: 118,695.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,372 : 329,058.05 = 79,130.61 : x
  2. Step 2: Convert to fraction form
    219,372/329,058.05 = 79,130.61/x
  3. Step 3: Cross multiply
    219,372x = 329,058.05 × 79,130.61
  4. Step 4: Simplify right side
    219,372x = 26,038,564,221.91
  5. Step 5: Solve for x
    x = 26,038,564,221.91/219,372
  6. Step 6: Final answer
    x = 118,695.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.