Home / 103,619.60-155,429.40-28,739.60

Finding the Fourth Proportional to 103,619.60, 155,429.40 and 28,739.60

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Solution

The fourth proportional to 103,619.60, 155,429.40 and 28,739.60 is: 43,109.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,619.60 : 155,429.40 = 28,739.60 : x
  2. Step 2: Convert to fraction form
    103,619.60/155,429.40 = 28,739.60/x
  3. Step 3: Cross multiply
    103,619.60x = 155,429.40 × 28,739.60
  4. Step 4: Simplify right side
    103,619.60x = 4,466,978,784.24
  5. Step 5: Solve for x
    x = 4,466,978,784.24/103,619.60
  6. Step 6: Final answer
    x = 43,109.40

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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.