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Finding the Fourth Proportional to 103,639.44, 155,459.16 and 28,759.60

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Solution

The fourth proportional to 103,639.44, 155,459.16 and 28,759.60 is: 43,139.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.44 : 155,459.16 = 28,759.60 : x
  2. Step 2: Convert to fraction form
    103,639.44/155,459.16 = 28,759.60/x
  3. Step 3: Cross multiply
    103,639.44x = 155,459.16 × 28,759.60
  4. Step 4: Simplify right side
    103,639.44x = 4,470,943,257.94
  5. Step 5: Solve for x
    x = 4,470,943,257.94/103,639.44
  6. Step 6: Final answer
    x = 43,139.40

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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.