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Finding the Fourth Proportional to 120,346.40, 166,080.56 and 65,900.86

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Solution

The fourth proportional to 120,346.40, 166,080.56 and 65,900.86 is: 90,944.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,346.40 : 166,080.56 = 65,900.86 : x
  2. Step 2: Convert to fraction form
    120,346.40/166,080.56 = 65,900.86/x
  3. Step 3: Cross multiply
    120,346.40x = 166,080.56 × 65,900.86
  4. Step 4: Simplify right side
    120,346.40x = 10,944,851,733.28
  5. Step 5: Solve for x
    x = 10,944,851,733.28/120,346.40
  6. Step 6: Final answer
    x = 90,944.57

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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.