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Finding the Fourth Proportional to 187,261.95, 280,761.69 and 68,917.89

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Solution

The fourth proportional to 187,261.95, 280,761.69 and 68,917.89 is: 103,328.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,261.95 : 280,761.69 = 68,917.89 : x
  2. Step 2: Convert to fraction form
    187,261.95/280,761.69 = 68,917.89/x
  3. Step 3: Cross multiply
    187,261.95x = 280,761.69 × 68,917.89
  4. Step 4: Simplify right side
    187,261.95x = 19,349,503,267.63
  5. Step 5: Solve for x
    x = 19,349,503,267.63/187,261.95
  6. Step 6: Final answer
    x = 103,328.54

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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.