Home / 135,025.31-186,334.94-78,440.33

Finding the Fourth Proportional to 135,025.31, 186,334.94 and 78,440.33

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Solution

The fourth proportional to 135,025.31, 186,334.94 and 78,440.33 is: 108,247.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,025.31 : 186,334.94 = 78,440.33 : x
  2. Step 2: Convert to fraction form
    135,025.31/186,334.94 = 78,440.33/x
  3. Step 3: Cross multiply
    135,025.31x = 186,334.94 × 78,440.33
  4. Step 4: Simplify right side
    135,025.31x = 14,616,174,846.07
  5. Step 5: Solve for x
    x = 14,616,174,846.07/135,025.31
  6. Step 6: Final answer
    x = 108,247.67

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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.