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Finding the Fourth Proportional to 139,277.09, 208,835.50 and 74,281.31

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Solution

The fourth proportional to 139,277.09, 208,835.50 and 74,281.31 is: 111,379.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,277.09 : 208,835.50 = 74,281.31 : x
  2. Step 2: Convert to fraction form
    139,277.09/208,835.50 = 74,281.31/x
  3. Step 3: Cross multiply
    139,277.09x = 208,835.50 × 74,281.31
  4. Step 4: Simplify right side
    139,277.09x = 15,512,574,514.51
  5. Step 5: Solve for x
    x = 15,512,574,514.51/139,277.09
  6. Step 6: Final answer
    x = 111,379.23

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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.