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Finding the Fourth Proportional to 120,431.76, 166,200.56 and 66,715.76

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Solution

The fourth proportional to 120,431.76, 166,200.56 and 66,715.76 is: 92,070.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,431.76 : 166,200.56 = 66,715.76 : x
  2. Step 2: Convert to fraction form
    120,431.76/166,200.56 = 66,715.76/x
  3. Step 3: Cross multiply
    120,431.76x = 166,200.56 × 66,715.76
  4. Step 4: Simplify right side
    120,431.76x = 11,088,196,672.83
  5. Step 5: Solve for x
    x = 11,088,196,672.83/120,431.76
  6. Step 6: Final answer
    x = 92,070.37

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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.