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Finding the Fourth Proportional to 120,572.90, 166,389.93 and 66,865.85

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Solution

The fourth proportional to 120,572.90, 166,389.93 and 66,865.85 is: 92,274.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,572.90 : 166,389.93 = 66,865.85 : x
  2. Step 2: Convert to fraction form
    120,572.90/166,389.93 = 66,865.85/x
  3. Step 3: Cross multiply
    120,572.90x = 166,389.93 × 66,865.85
  4. Step 4: Simplify right side
    120,572.90x = 11,125,804,100.89
  5. Step 5: Solve for x
    x = 11,125,804,100.89/120,572.90
  6. Step 6: Final answer
    x = 92,274.50

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.