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Finding the Fourth Proportional to 118,491.58, 163,511.76 and 64,765.90

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Solution

The fourth proportional to 118,491.58, 163,511.76 and 64,765.90 is: 89,373.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,491.58 : 163,511.76 = 64,765.90 : x
  2. Step 2: Convert to fraction form
    118,491.58/163,511.76 = 64,765.90/x
  3. Step 3: Cross multiply
    118,491.58x = 163,511.76 × 64,765.90
  4. Step 4: Simplify right side
    118,491.58x = 10,589,986,296.98
  5. Step 5: Solve for x
    x = 10,589,986,296.98/118,491.58
  6. Step 6: Final answer
    x = 89,373.32

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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.