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Finding the Fourth Proportional to 159,328, 219,887.28 and 87,722.56

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Solution

The fourth proportional to 159,328, 219,887.28 and 87,722.56 is: 121,065.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,328 : 219,887.28 = 87,722.56 : x
  2. Step 2: Convert to fraction form
    159,328/219,887.28 = 87,722.56/x
  3. Step 3: Cross multiply
    159,328x = 219,887.28 × 87,722.56
  4. Step 4: Simplify right side
    159,328x = 19,289,075,113.04
  5. Step 5: Solve for x
    x = 19,289,075,113.04/159,328
  6. Step 6: Final answer
    x = 121,065.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.