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Finding the Fourth Proportional to 139,186.54, 208,742.55 and 39,323.26

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Solution

The fourth proportional to 139,186.54, 208,742.55 and 39,323.26 is: 58,974.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,186.54 : 208,742.55 = 39,323.26 : x
  2. Step 2: Convert to fraction form
    139,186.54/208,742.55 = 39,323.26/x
  3. Step 3: Cross multiply
    139,186.54x = 208,742.55 × 39,323.26
  4. Step 4: Simplify right side
    139,186.54x = 8,208,437,566.71
  5. Step 5: Solve for x
    x = 8,208,437,566.71/139,186.54
  6. Step 6: Final answer
    x = 58,974.36

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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.