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Finding the Fourth Proportional to 139,157.74, 208,736.60 and 49,266.40

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Solution

The fourth proportional to 139,157.74, 208,736.60 and 49,266.40 is: 73,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,157.74 : 208,736.60 = 49,266.40 : x
  2. Step 2: Convert to fraction form
    139,157.74/208,736.60 = 49,266.40/x
  3. Step 3: Cross multiply
    139,157.74x = 208,736.60 × 49,266.40
  4. Step 4: Simplify right side
    139,157.74x = 10,283,700,830.24
  5. Step 5: Solve for x
    x = 10,283,700,830.24/139,157.74
  6. Step 6: Final answer
    x = 73,899.60

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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.