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Finding the Fourth Proportional to 72,852.66, 109,161.54 and 57,339.54

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Solution

The fourth proportional to 72,852.66, 109,161.54 and 57,339.54 is: 85,916.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,852.66 : 109,161.54 = 57,339.54 : x
  2. Step 2: Convert to fraction form
    72,852.66/109,161.54 = 57,339.54/x
  3. Step 3: Cross multiply
    72,852.66x = 109,161.54 × 57,339.54
  4. Step 4: Simplify right side
    72,852.66x = 6,259,272,489.29
  5. Step 5: Solve for x
    x = 6,259,272,489.29/72,852.66
  6. Step 6: Final answer
    x = 85,916.87

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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.