Home / 103,620.38-155,430.60-28,759.40

Finding the Fourth Proportional to 103,620.38, 155,430.60 and 28,759.40

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Solution

The fourth proportional to 103,620.38, 155,430.60 and 28,759.40 is: 43,139.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,620.38 : 155,430.60 = 28,759.40 : x
  2. Step 2: Convert to fraction form
    103,620.38/155,430.60 = 28,759.40/x
  3. Step 3: Cross multiply
    103,620.38x = 155,430.60 × 28,759.40
  4. Step 4: Simplify right side
    103,620.38x = 4,470,090,797.64
  5. Step 5: Solve for x
    x = 4,470,090,797.64/103,620.38
  6. Step 6: Final answer
    x = 43,139.11

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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.