Home / 121,289.28-181,966.72-68,735.67

Finding the Fourth Proportional to 121,289.28, 181,966.72 and 68,735.67

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Solution

The fourth proportional to 121,289.28, 181,966.72 and 68,735.67 is: 103,122.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,289.28 : 181,966.72 = 68,735.67 : x
  2. Step 2: Convert to fraction form
    121,289.28/181,966.72 = 68,735.67/x
  3. Step 3: Cross multiply
    121,289.28x = 181,966.72 × 68,735.67
  4. Step 4: Simplify right side
    121,289.28x = 12,507,604,416.90
  5. Step 5: Solve for x
    x = 12,507,604,416.90/121,289.28
  6. Step 6: Final answer
    x = 103,122.09

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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.