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Finding the Fourth Proportional to 219,370.50, 329,055.80 and 79,129.11

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Solution

The fourth proportional to 219,370.50, 329,055.80 and 79,129.11 is: 118,693.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,370.50 : 329,055.80 = 79,129.11 : x
  2. Step 2: Convert to fraction form
    219,370.50/329,055.80 = 79,129.11/x
  3. Step 3: Cross multiply
    219,370.50x = 329,055.80 × 79,129.11
  4. Step 4: Simplify right side
    219,370.50x = 26,037,892,594.34
  5. Step 5: Solve for x
    x = 26,037,892,594.34/219,370.50
  6. Step 6: Final answer
    x = 118,693.68

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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.