Home / 103,620.69-155,430.93-28,759.68

Finding the Fourth Proportional to 103,620.69, 155,430.93 and 28,759.68

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Solution

The fourth proportional to 103,620.69, 155,430.93 and 28,759.68 is: 43,139.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,620.69 : 155,430.93 = 28,759.68 : x
  2. Step 2: Convert to fraction form
    103,620.69/155,430.93 = 28,759.68/x
  3. Step 3: Cross multiply
    103,620.69x = 155,430.93 × 28,759.68
  4. Step 4: Simplify right side
    103,620.69x = 4,470,143,808.90
  5. Step 5: Solve for x
    x = 4,470,143,808.90/103,620.69
  6. Step 6: Final answer
    x = 43,139.49

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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.