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Finding the Fourth Proportional to 118,658, 163,746.78 and 67,679.06

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Solution

The fourth proportional to 118,658, 163,746.78 and 67,679.06 is: 93,396.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,658 : 163,746.78 = 67,679.06 : x
  2. Step 2: Convert to fraction form
    118,658/163,746.78 = 67,679.06/x
  3. Step 3: Cross multiply
    118,658x = 163,746.78 × 67,679.06
  4. Step 4: Simplify right side
    118,658x = 11,082,228,148.43
  5. Step 5: Solve for x
    x = 11,082,228,148.43/118,658
  6. Step 6: Final answer
    x = 93,396.38

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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.