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Finding the Fourth Proportional to 219,909.70, 329,864.55 and 72,165.70

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Solution

The fourth proportional to 219,909.70, 329,864.55 and 72,165.70 is: 108,248.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,909.70 : 329,864.55 = 72,165.70 : x
  2. Step 2: Convert to fraction form
    219,909.70/329,864.55 = 72,165.70/x
  3. Step 3: Cross multiply
    219,909.70x = 329,864.55 × 72,165.70
  4. Step 4: Simplify right side
    219,909.70x = 23,804,906,155.94
  5. Step 5: Solve for x
    x = 23,804,906,155.94/219,909.70
  6. Step 6: Final answer
    x = 108,248.55

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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.