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Finding the Fourth Proportional to 172,603.20, 258,816.96 and 79,028.76

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Solution

The fourth proportional to 172,603.20, 258,816.96 and 79,028.76 is: 118,502.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,603.20 : 258,816.96 = 79,028.76 : x
  2. Step 2: Convert to fraction form
    172,603.20/258,816.96 = 79,028.76/x
  3. Step 3: Cross multiply
    172,603.20x = 258,816.96 × 79,028.76
  4. Step 4: Simplify right side
    172,603.20x = 20,453,983,415.77
  5. Step 5: Solve for x
    x = 20,453,983,415.77/172,603.20
  6. Step 6: Final answer
    x = 118,502.92

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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.