Home / 78,268.77-107,929.71-66,975.64

Finding the Fourth Proportional to 78,268.77, 107,929.71 and 66,975.64

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Solution

The fourth proportional to 78,268.77, 107,929.71 and 66,975.64 is: 92,356.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,268.77 : 107,929.71 = 66,975.64 : x
  2. Step 2: Convert to fraction form
    78,268.77/107,929.71 = 66,975.64/x
  3. Step 3: Cross multiply
    78,268.77x = 107,929.71 × 66,975.64
  4. Step 4: Simplify right side
    78,268.77x = 7,228,661,402.26
  5. Step 5: Solve for x
    x = 7,228,661,402.26/78,268.77
  6. Step 6: Final answer
    x = 92,356.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.