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Finding the Fourth Proportional to 78,903, 108,889.38 and 45,369

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Solution

The fourth proportional to 78,903, 108,889.38 and 45,369 is: 62,611.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,903 : 108,889.38 = 45,369 : x
  2. Step 2: Convert to fraction form
    78,903/108,889.38 = 45,369/x
  3. Step 3: Cross multiply
    78,903x = 108,889.38 × 45,369
  4. Step 4: Simplify right side
    78,903x = 4,940,202,281.22
  5. Step 5: Solve for x
    x = 4,940,202,281.22/78,903
  6. Step 6: Final answer
    x = 62,611.08

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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.