Home / 103,620.18-155,430.19-28,759.17

Finding the Fourth Proportional to 103,620.18, 155,430.19 and 28,759.17

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Solution

The fourth proportional to 103,620.18, 155,430.19 and 28,759.17 is: 43,138.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,620.18 : 155,430.19 = 28,759.17 : x
  2. Step 2: Convert to fraction form
    103,620.18/155,430.19 = 28,759.17/x
  3. Step 3: Cross multiply
    103,620.18x = 155,430.19 × 28,759.17
  4. Step 4: Simplify right side
    103,620.18x = 4,470,043,257.34
  5. Step 5: Solve for x
    x = 4,470,043,257.34/103,620.18
  6. Step 6: Final answer
    x = 43,138.73

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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.