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Finding the Fourth Proportional to 172,295.11, 258,617.63 and 122,431.51

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Solution

The fourth proportional to 172,295.11, 258,617.63 and 122,431.51 is: 183,771.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,295.11 : 258,617.63 = 122,431.51 : x
  2. Step 2: Convert to fraction form
    172,295.11/258,617.63 = 122,431.51/x
  3. Step 3: Cross multiply
    172,295.11x = 258,617.63 × 122,431.51
  4. Step 4: Simplify right side
    172,295.11x = 31,662,946,953.52
  5. Step 5: Solve for x
    x = 31,662,946,953.52/172,295.11
  6. Step 6: Final answer
    x = 183,771.59

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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.