Home / 135,024.69-186,334.07-78,439.71

Finding the Fourth Proportional to 135,024.69, 186,334.07 and 78,439.71

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Solution

The fourth proportional to 135,024.69, 186,334.07 and 78,439.71 is: 108,246.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,024.69 : 186,334.07 = 78,439.71 : x
  2. Step 2: Convert to fraction form
    135,024.69/186,334.07 = 78,439.71/x
  3. Step 3: Cross multiply
    135,024.69x = 186,334.07 × 78,439.71
  4. Step 4: Simplify right side
    135,024.69x = 14,615,990,413.92
  5. Step 5: Solve for x
    x = 14,615,990,413.92/135,024.69
  6. Step 6: Final answer
    x = 108,246.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.