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Finding the Fourth Proportional to 115,380.15, 172,941.08 and 75,476.00

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Solution

The fourth proportional to 115,380.15, 172,941.08 and 75,476.00 is: 113,129.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,380.15 : 172,941.08 = 75,476.00 : x
  2. Step 2: Convert to fraction form
    115,380.15/172,941.08 = 75,476.00/x
  3. Step 3: Cross multiply
    115,380.15x = 172,941.08 × 75,476.00
  4. Step 4: Simplify right side
    115,380.15x = 13,052,901,009.05
  5. Step 5: Solve for x
    x = 13,052,901,009.05/115,380.15
  6. Step 6: Final answer
    x = 113,129.52

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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.