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Finding the Fourth Proportional to 219,688.80, 329,662.80 and 79,429.20

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Solution

The fourth proportional to 219,688.80, 329,662.80 and 79,429.20 is: 119,190.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,688.80 : 329,662.80 = 79,429.20 : x
  2. Step 2: Convert to fraction form
    219,688.80/329,662.80 = 79,429.20/x
  3. Step 3: Cross multiply
    219,688.80x = 329,662.80 × 79,429.20
  4. Step 4: Simplify right side
    219,688.80x = 26,184,852,473.76
  5. Step 5: Solve for x
    x = 26,184,852,473.76/219,688.80
  6. Step 6: Final answer
    x = 119,190.66

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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.