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Finding the Fourth Proportional to 69,365.40, 104,048.10 and 66,643.80

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Solution

The fourth proportional to 69,365.40, 104,048.10 and 66,643.80 is: 99,965.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,365.40 : 104,048.10 = 66,643.80 : x
  2. Step 2: Convert to fraction form
    69,365.40/104,048.10 = 66,643.80/x
  3. Step 3: Cross multiply
    69,365.40x = 104,048.10 × 66,643.80
  4. Step 4: Simplify right side
    69,365.40x = 6,934,160,766.78
  5. Step 5: Solve for x
    x = 6,934,160,766.78/69,365.40
  6. Step 6: Final answer
    x = 99,965.70

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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.