Home / 139,279.09-208,838.50-74,283.31

Finding the Fourth Proportional to 139,279.09, 208,838.50 and 74,283.31

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Solution

The fourth proportional to 139,279.09, 208,838.50 and 74,283.31 is: 111,382.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,279.09 : 208,838.50 = 74,283.31 : x
  2. Step 2: Convert to fraction form
    139,279.09/208,838.50 = 74,283.31/x
  3. Step 3: Cross multiply
    139,279.09x = 208,838.50 × 74,283.31
  4. Step 4: Simplify right side
    139,279.09x = 15,513,215,035.44
  5. Step 5: Solve for x
    x = 15,513,215,035.44/139,279.09
  6. Step 6: Final answer
    x = 111,382.23

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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.