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Finding the Fourth Proportional to 118,638, 163,749.60 and 68,366.16

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Solution

The fourth proportional to 118,638, 163,749.60 and 68,366.16 is: 94,362.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,638 : 163,749.60 = 68,366.16 : x
  2. Step 2: Convert to fraction form
    118,638/163,749.60 = 68,366.16/x
  3. Step 3: Cross multiply
    118,638x = 163,749.60 × 68,366.16
  4. Step 4: Simplify right side
    118,638x = 11,194,931,353.54
  5. Step 5: Solve for x
    x = 11,194,931,353.54/118,638
  6. Step 6: Final answer
    x = 94,362.10

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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.