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Finding the Fourth Proportional to 172,709.51, 259,073.51 and 54,390.06

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Solution

The fourth proportional to 172,709.51, 259,073.51 and 54,390.06 is: 81,588.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,709.51 : 259,073.51 = 54,390.06 : x
  2. Step 2: Convert to fraction form
    172,709.51/259,073.51 = 54,390.06/x
  3. Step 3: Cross multiply
    172,709.51x = 259,073.51 × 54,390.06
  4. Step 4: Simplify right side
    172,709.51x = 14,091,023,481.36
  5. Step 5: Solve for x
    x = 14,091,023,481.36/172,709.51
  6. Step 6: Final answer
    x = 81,588.00

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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.