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Finding the Fourth Proportional to 178,889.40, 246,890.79 and 115,411.86

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Solution

The fourth proportional to 178,889.40, 246,890.79 and 115,411.86 is: 159,283.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,889.40 : 246,890.79 = 115,411.86 : x
  2. Step 2: Convert to fraction form
    178,889.40/246,890.79 = 115,411.86/x
  3. Step 3: Cross multiply
    178,889.40x = 246,890.79 × 115,411.86
  4. Step 4: Simplify right side
    178,889.40x = 28,494,125,290.77
  5. Step 5: Solve for x
    x = 28,494,125,290.77/178,889.40
  6. Step 6: Final answer
    x = 159,283.48

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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.