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Finding the Fourth Proportional to 118,638.18, 163,719.46 and 67,659.21

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Solution

The fourth proportional to 118,638.18, 163,719.46 and 67,659.21 is: 93,369.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,638.18 : 163,719.46 = 67,659.21 : x
  2. Step 2: Convert to fraction form
    118,638.18/163,719.46 = 67,659.21/x
  3. Step 3: Cross multiply
    118,638.18x = 163,719.46 × 67,659.21
  4. Step 4: Simplify right side
    118,638.18x = 11,077,129,325.23
  5. Step 5: Solve for x
    x = 11,077,129,325.23/118,638.18
  6. Step 6: Final answer
    x = 93,369.01

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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.