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Finding the Fourth Proportional to 120,339.60, 166,070.70 and 65,896.56

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Solution

The fourth proportional to 120,339.60, 166,070.70 and 65,896.56 is: 90,938.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,339.60 : 166,070.70 = 65,896.56 : x
  2. Step 2: Convert to fraction form
    120,339.60/166,070.70 = 65,896.56/x
  3. Step 3: Cross multiply
    120,339.60x = 166,070.70 × 65,896.56
  4. Step 4: Simplify right side
    120,339.60x = 10,943,487,846.79
  5. Step 5: Solve for x
    x = 10,943,487,846.79/120,339.60
  6. Step 6: Final answer
    x = 90,938.38

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1.5x scale

Why These Related Problems?

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