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Finding the Fourth Proportional to 172,752.13, 259,070.31 and 66,111.31

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Solution

The fourth proportional to 172,752.13, 259,070.31 and 66,111.31 is: 99,144.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,752.13 : 259,070.31 = 66,111.31 : x
  2. Step 2: Convert to fraction form
    172,752.13/259,070.31 = 66,111.31/x
  3. Step 3: Cross multiply
    172,752.13x = 259,070.31 × 66,111.31
  4. Step 4: Simplify right side
    172,752.13x = 17,127,477,576.21
  5. Step 5: Solve for x
    x = 17,127,477,576.21/172,752.13
  6. Step 6: Final answer
    x = 99,144.81

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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.