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Finding the Fourth Proportional to 118,415.20, 177,622.80 and 103,208.80

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Solution

The fourth proportional to 118,415.20, 177,622.80 and 103,208.80 is: 154,813.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,415.20 : 177,622.80 = 103,208.80 : x
  2. Step 2: Convert to fraction form
    118,415.20/177,622.80 = 103,208.80/x
  3. Step 3: Cross multiply
    118,415.20x = 177,622.80 × 103,208.80
  4. Step 4: Simplify right side
    118,415.20x = 18,332,236,040.64
  5. Step 5: Solve for x
    x = 18,332,236,040.64/118,415.20
  6. Step 6: Final answer
    x = 154,813.20

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1.5x scale

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.