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Finding the Fourth Proportional to 172,277.10, 258,415.80 and 65,636.28

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Solution

The fourth proportional to 172,277.10, 258,415.80 and 65,636.28 is: 98,454.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,277.10 : 258,415.80 = 65,636.28 : x
  2. Step 2: Convert to fraction form
    172,277.10/258,415.80 = 65,636.28/x
  3. Step 3: Cross multiply
    172,277.10x = 258,415.80 × 65,636.28
  4. Step 4: Simplify right side
    172,277.10x = 16,961,451,805.22
  5. Step 5: Solve for x
    x = 16,961,451,805.22/172,277.10
  6. Step 6: Final answer
    x = 98,454.48

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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.