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Finding the Fourth Proportional to 172,289.76, 258,278.94 and 61,455.84

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Solution

The fourth proportional to 172,289.76, 258,278.94 and 61,455.84 is: 92,128.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,289.76 : 258,278.94 = 61,455.84 : x
  2. Step 2: Convert to fraction form
    172,289.76/258,278.94 = 61,455.84/x
  3. Step 3: Cross multiply
    172,289.76x = 258,278.94 × 61,455.84
  4. Step 4: Simplify right side
    172,289.76x = 15,872,749,212.01
  5. Step 5: Solve for x
    x = 15,872,749,212.01/172,289.76
  6. Step 6: Final answer
    x = 92,128.22

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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.