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Finding the Fourth Proportional to 118,168.12, 163,068 and 70,396.72

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Solution

The fourth proportional to 118,168.12, 163,068 and 70,396.72 is: 97,145.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,168.12 : 163,068 = 70,396.72 : x
  2. Step 2: Convert to fraction form
    118,168.12/163,068 = 70,396.72/x
  3. Step 3: Cross multiply
    118,168.12x = 163,068 × 70,396.72
  4. Step 4: Simplify right side
    118,168.12x = 11,479,452,336.96
  5. Step 5: Solve for x
    x = 11,479,452,336.96/118,168.12
  6. Step 6: Final answer
    x = 97,145.09

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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.