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Finding the Fourth Proportional to 118,586.70, 177,531.21 and 74,078.55

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Solution

The fourth proportional to 118,586.70, 177,531.21 and 74,078.55 is: 110,899.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,586.70 : 177,531.21 = 74,078.55 : x
  2. Step 2: Convert to fraction form
    118,586.70/177,531.21 = 74,078.55/x
  3. Step 3: Cross multiply
    118,586.70x = 177,531.21 × 74,078.55
  4. Step 4: Simplify right side
    118,586.70x = 13,151,254,616.55
  5. Step 5: Solve for x
    x = 13,151,254,616.55/118,586.70
  6. Step 6: Final answer
    x = 110,899.91

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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.