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Finding the Fourth Proportional to 69,042.54, 103,574.06 and 21,661.53

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Solution

The fourth proportional to 69,042.54, 103,574.06 and 21,661.53 is: 32,495.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,042.54 : 103,574.06 = 21,661.53 : x
  2. Step 2: Convert to fraction form
    69,042.54/103,574.06 = 21,661.53/x
  3. Step 3: Cross multiply
    69,042.54x = 103,574.06 × 21,661.53
  4. Step 4: Simplify right side
    69,042.54x = 2,243,572,607.91
  5. Step 5: Solve for x
    x = 2,243,572,607.91/69,042.54
  6. Step 6: Final answer
    x = 32,495.51

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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.