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Finding the Fourth Proportional to 115,015.68, 172,775.00 and 81,948.24

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Solution

The fourth proportional to 115,015.68, 172,775.00 and 81,948.24 is: 123,101.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,015.68 : 172,775.00 = 81,948.24 : x
  2. Step 2: Convert to fraction form
    115,015.68/172,775.00 = 81,948.24/x
  3. Step 3: Cross multiply
    115,015.68x = 172,775.00 × 81,948.24
  4. Step 4: Simplify right side
    115,015.68x = 14,158,607,370.87
  5. Step 5: Solve for x
    x = 14,158,607,370.87/115,015.68
  6. Step 6: Final answer
    x = 123,101.54

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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.