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Finding the Fourth Proportional to 74,392.64, 102,660.72 and 42,569.36

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Solution

The fourth proportional to 74,392.64, 102,660.72 and 42,569.36 is: 58,745.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,392.64 : 102,660.72 = 42,569.36 : x
  2. Step 2: Convert to fraction form
    74,392.64/102,660.72 = 42,569.36/x
  3. Step 3: Cross multiply
    74,392.64x = 102,660.72 × 42,569.36
  4. Step 4: Simplify right side
    74,392.64x = 4,370,201,147.54
  5. Step 5: Solve for x
    x = 4,370,201,147.54/74,392.64
  6. Step 6: Final answer
    x = 58,745.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.