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Finding the Fourth Proportional to 139,045.68, 208,620.64 and 64,201.68

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Solution

The fourth proportional to 139,045.68, 208,620.64 and 64,201.68 is: 96,326.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,045.68 : 208,620.64 = 64,201.68 : x
  2. Step 2: Convert to fraction form
    139,045.68/208,620.64 = 64,201.68/x
  3. Step 3: Cross multiply
    139,045.68x = 208,620.64 × 64,201.68
  4. Step 4: Simplify right side
    139,045.68x = 13,393,795,570.68
  5. Step 5: Solve for x
    x = 13,393,795,570.68/139,045.68
  6. Step 6: Final answer
    x = 96,326.59

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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.