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Finding the Fourth Proportional to 118,378.53, 163,359.65 and 64,663.79

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Solution

The fourth proportional to 118,378.53, 163,359.65 and 64,663.79 is: 89,234.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,378.53 : 163,359.65 = 64,663.79 : x
  2. Step 2: Convert to fraction form
    118,378.53/163,359.65 = 64,663.79/x
  3. Step 3: Cross multiply
    118,378.53x = 163,359.65 × 64,663.79
  4. Step 4: Simplify right side
    118,378.53x = 10,563,453,446.93
  5. Step 5: Solve for x
    x = 10,563,453,446.93/118,378.53
  6. Step 6: Final answer
    x = 89,234.54

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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.