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Finding the Fourth Proportional to 118,389.70, 177,584.55 and 74,152.90

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Solution

The fourth proportional to 118,389.70, 177,584.55 and 74,152.90 is: 111,229.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,389.70 : 177,584.55 = 74,152.90 : x
  2. Step 2: Convert to fraction form
    118,389.70/177,584.55 = 74,152.90/x
  3. Step 3: Cross multiply
    118,389.70x = 177,584.55 × 74,152.90
  4. Step 4: Simplify right side
    118,389.70x = 13,168,409,377.70
  5. Step 5: Solve for x
    x = 13,168,409,377.70/118,389.70
  6. Step 6: Final answer
    x = 111,229.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.