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Finding the Fourth Proportional to 69,762.64, 104,643.72 and 19,161.72

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Solution

The fourth proportional to 69,762.64, 104,643.72 and 19,161.72 is: 28,742.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,762.64 : 104,643.72 = 19,161.72 : x
  2. Step 2: Convert to fraction form
    69,762.64/104,643.72 = 19,161.72/x
  3. Step 3: Cross multiply
    69,762.64x = 104,643.72 × 19,161.72
  4. Step 4: Simplify right side
    69,762.64x = 2,005,153,662.40
  5. Step 5: Solve for x
    x = 2,005,153,662.40/69,762.64
  6. Step 6: Final answer
    x = 28,742.51

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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.