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Finding the Fourth Proportional to 139,307.60, 208,818.42 and 55,033.64

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Solution

The fourth proportional to 139,307.60, 208,818.42 and 55,033.64 is: 82,493.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,307.60 : 208,818.42 = 55,033.64 : x
  2. Step 2: Convert to fraction form
    139,307.60/208,818.42 = 55,033.64/x
  3. Step 3: Cross multiply
    139,307.60x = 208,818.42 × 55,033.64
  4. Step 4: Simplify right side
    139,307.60x = 11,492,037,751.65
  5. Step 5: Solve for x
    x = 11,492,037,751.65/139,307.60
  6. Step 6: Final answer
    x = 82,493.98

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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.