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Finding the Fourth Proportional to 219,263.16, 328,916.21 and 91,152.95

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Solution

The fourth proportional to 219,263.16, 328,916.21 and 91,152.95 is: 136,738.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,263.16 : 328,916.21 = 91,152.95 : x
  2. Step 2: Convert to fraction form
    219,263.16/328,916.21 = 91,152.95/x
  3. Step 3: Cross multiply
    219,263.16x = 328,916.21 × 91,152.95
  4. Step 4: Simplify right side
    219,263.16x = 29,981,682,388.55
  5. Step 5: Solve for x
    x = 29,981,682,388.55/219,263.16
  6. Step 6: Final answer
    x = 136,738.35

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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.