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Finding the Fourth Proportional to 139,330.87, 208,955.27 and 39,499.79

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Solution

The fourth proportional to 139,330.87, 208,955.27 and 39,499.79 is: 59,238.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,330.87 : 208,955.27 = 39,499.79 : x
  2. Step 2: Convert to fraction form
    139,330.87/208,955.27 = 39,499.79/x
  3. Step 3: Cross multiply
    139,330.87x = 208,955.27 × 39,499.79
  4. Step 4: Simplify right side
    139,330.87x = 8,253,688,338.37
  5. Step 5: Solve for x
    x = 8,253,688,338.37/139,330.87
  6. Step 6: Final answer
    x = 59,238.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.