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Finding the Fourth Proportional to 113,379.65, 156,470.38 and 64,989.63

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Solution

The fourth proportional to 113,379.65, 156,470.38 and 64,989.63 is: 89,689.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,379.65 : 156,470.38 = 64,989.63 : x
  2. Step 2: Convert to fraction form
    113,379.65/156,470.38 = 64,989.63/x
  3. Step 3: Cross multiply
    113,379.65x = 156,470.38 × 64,989.63
  4. Step 4: Simplify right side
    113,379.65x = 10,168,951,939.69
  5. Step 5: Solve for x
    x = 10,168,951,939.69/113,379.65
  6. Step 6: Final answer
    x = 89,689.39

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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.