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Finding the Fourth Proportional to 72,959.60, 100,685.80 and 41,128.49

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Solution

The fourth proportional to 72,959.60, 100,685.80 and 41,128.49 is: 56,758.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,959.60 : 100,685.80 = 41,128.49 : x
  2. Step 2: Convert to fraction form
    72,959.60/100,685.80 = 41,128.49/x
  3. Step 3: Cross multiply
    72,959.60x = 100,685.80 × 41,128.49
  4. Step 4: Simplify right side
    72,959.60x = 4,141,054,918.44
  5. Step 5: Solve for x
    x = 4,141,054,918.44/72,959.60
  6. Step 6: Final answer
    x = 56,758.19

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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.