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Finding the Fourth Proportional to 219,781.36, 329,671.74 and 79,507.12

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Solution

The fourth proportional to 219,781.36, 329,671.74 and 79,507.12 is: 119,260.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,781.36 : 329,671.74 = 79,507.12 : x
  2. Step 2: Convert to fraction form
    219,781.36/329,671.74 = 79,507.12/x
  3. Step 3: Cross multiply
    219,781.36x = 329,671.74 × 79,507.12
  4. Step 4: Simplify right side
    219,781.36x = 26,211,250,592.79
  5. Step 5: Solve for x
    x = 26,211,250,592.79/219,781.36
  6. Step 6: Final answer
    x = 119,260.57

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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.