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Finding the Fourth Proportional to 69,403.68, 104,122.80 and 39,840.48

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Solution

The fourth proportional to 69,403.68, 104,122.80 and 39,840.48 is: 59,770.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,403.68 : 104,122.80 = 39,840.48 : x
  2. Step 2: Convert to fraction form
    69,403.68/104,122.80 = 39,840.48/x
  3. Step 3: Cross multiply
    69,403.68x = 104,122.80 × 39,840.48
  4. Step 4: Simplify right side
    69,403.68x = 4,148,302,330.94
  5. Step 5: Solve for x
    x = 4,148,302,330.94/69,403.68
  6. Step 6: Final answer
    x = 59,770.64

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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.