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Finding the Fourth Proportional to 68,261.76, 102,409.92 and 28,798.56

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Solution

The fourth proportional to 68,261.76, 102,409.92 and 28,798.56 is: 43,205.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,261.76 : 102,409.92 = 28,798.56 : x
  2. Step 2: Convert to fraction form
    68,261.76/102,409.92 = 28,798.56/x
  3. Step 3: Cross multiply
    68,261.76x = 102,409.92 × 28,798.56
  4. Step 4: Simplify right side
    68,261.76x = 2,949,258,225.72
  5. Step 5: Solve for x
    x = 2,949,258,225.72/68,261.76
  6. Step 6: Final answer
    x = 43,205.13

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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.