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Finding the Fourth Proportional to 72,901, 100,603.38 and 39,367

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Solution

The fourth proportional to 72,901, 100,603.38 and 39,367 is: 54,326.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,901 : 100,603.38 = 39,367 : x
  2. Step 2: Convert to fraction form
    72,901/100,603.38 = 39,367/x
  3. Step 3: Cross multiply
    72,901x = 100,603.38 × 39,367
  4. Step 4: Simplify right side
    72,901x = 3,960,453,260.46
  5. Step 5: Solve for x
    x = 3,960,453,260.46/72,901
  6. Step 6: Final answer
    x = 54,326.46

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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.