Home / 121,154.89-167,190.83-67,438.78

Finding the Fourth Proportional to 121,154.89, 167,190.83 and 67,438.78

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Solution

The fourth proportional to 121,154.89, 167,190.83 and 67,438.78 is: 93,063.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,154.89 : 167,190.83 = 67,438.78 : x
  2. Step 2: Convert to fraction form
    121,154.89/167,190.83 = 67,438.78/x
  3. Step 3: Cross multiply
    121,154.89x = 167,190.83 × 67,438.78
  4. Step 4: Simplify right side
    121,154.89x = 11,275,145,479.46
  5. Step 5: Solve for x
    x = 11,275,145,479.46/121,154.89
  6. Step 6: Final answer
    x = 93,063.89

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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.