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Finding the Fourth Proportional to 219,092.70, 328,513.32 and 85,816.92

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Solution

The fourth proportional to 219,092.70, 328,513.32 and 85,816.92 is: 128,676.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,092.70 : 328,513.32 = 85,816.92 : x
  2. Step 2: Convert to fraction form
    219,092.70/328,513.32 = 85,816.92/x
  3. Step 3: Cross multiply
    219,092.70x = 328,513.32 × 85,816.92
  4. Step 4: Simplify right side
    219,092.70x = 28,192,001,301.37
  5. Step 5: Solve for x
    x = 28,192,001,301.37/219,092.70
  6. Step 6: Final answer
    x = 128,676.13

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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.