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Finding the Fourth Proportional to 219,603.80, 329,421.90 and 79,344.20

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Solution

The fourth proportional to 219,603.80, 329,421.90 and 79,344.20 is: 119,022.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,603.80 : 329,421.90 = 79,344.20 : x
  2. Step 2: Convert to fraction form
    219,603.80/329,421.90 = 79,344.20/x
  3. Step 3: Cross multiply
    219,603.80x = 329,421.90 × 79,344.20
  4. Step 4: Simplify right side
    219,603.80x = 26,137,717,117.98
  5. Step 5: Solve for x
    x = 26,137,717,117.98/219,603.80
  6. Step 6: Final answer
    x = 119,022.15

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1.5x scale

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.