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Finding the Fourth Proportional to 139,037.72, 191,770.13 and 91,273.64

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Solution

The fourth proportional to 139,037.72, 191,770.13 and 91,273.64 is: 125,890.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,037.72 : 191,770.13 = 91,273.64 : x
  2. Step 2: Convert to fraction form
    139,037.72/191,770.13 = 91,273.64/x
  3. Step 3: Cross multiply
    139,037.72x = 191,770.13 × 91,273.64
  4. Step 4: Simplify right side
    139,037.72x = 17,503,557,077.71
  5. Step 5: Solve for x
    x = 17,503,557,077.71/139,037.72
  6. Step 6: Final answer
    x = 125,890.71

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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.