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Finding the Fourth Proportional to 79,603.61, 109,868.68 and 45,634.90

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Solution

The fourth proportional to 79,603.61, 109,868.68 and 45,634.90 is: 62,985.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,603.61 : 109,868.68 = 45,634.90 : x
  2. Step 2: Convert to fraction form
    79,603.61/109,868.68 = 45,634.90/x
  3. Step 3: Cross multiply
    79,603.61x = 109,868.68 × 45,634.90
  4. Step 4: Simplify right side
    79,603.61x = 5,013,846,393.97
  5. Step 5: Solve for x
    x = 5,013,846,393.97/79,603.61
  6. Step 6: Final answer
    x = 62,985.16

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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.