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Finding the Fourth Proportional to 144,525.72, 216,591.60 and 69,640.40

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Solution

The fourth proportional to 144,525.72, 216,591.60 and 69,640.40 is: 104,365.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,525.72 : 216,591.60 = 69,640.40 : x
  2. Step 2: Convert to fraction form
    144,525.72/216,591.60 = 69,640.40/x
  3. Step 3: Cross multiply
    144,525.72x = 216,591.60 × 69,640.40
  4. Step 4: Simplify right side
    144,525.72x = 15,083,525,660.64
  5. Step 5: Solve for x
    x = 15,083,525,660.64/144,525.72
  6. Step 6: Final answer
    x = 104,365.68

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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.