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Finding the Fourth Proportional to 85,951.06, 128,978.43 and 36,703.06

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Solution

The fourth proportional to 85,951.06, 128,978.43 and 36,703.06 is: 55,076.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,951.06 : 128,978.43 = 36,703.06 : x
  2. Step 2: Convert to fraction form
    85,951.06/128,978.43 = 36,703.06/x
  3. Step 3: Cross multiply
    85,951.06x = 128,978.43 × 36,703.06
  4. Step 4: Simplify right side
    85,951.06x = 4,733,903,055.00
  5. Step 5: Solve for x
    x = 4,733,903,055.00/85,951.06
  6. Step 6: Final answer
    x = 55,076.73

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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.