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Finding the Fourth Proportional to 103,690.88, 155,518.72 and 28,818.24

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Solution

The fourth proportional to 103,690.88, 155,518.72 and 28,818.24 is: 43,222.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,690.88 : 155,518.72 = 28,818.24 : x
  2. Step 2: Convert to fraction form
    103,690.88/155,518.72 = 28,818.24/x
  3. Step 3: Cross multiply
    103,690.88x = 155,518.72 × 28,818.24
  4. Step 4: Simplify right side
    103,690.88x = 4,481,775,797.45
  5. Step 5: Solve for x
    x = 4,481,775,797.45/103,690.88
  6. Step 6: Final answer
    x = 43,222.47

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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.