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Finding the Fourth Proportional to 124,500, 171,810.55 and 67,912.59

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Solution

The fourth proportional to 124,500, 171,810.55 and 67,912.59 is: 93,719.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,500 : 171,810.55 = 67,912.59 : x
  2. Step 2: Convert to fraction form
    124,500/171,810.55 = 67,912.59/x
  3. Step 3: Cross multiply
    124,500x = 171,810.55 × 67,912.59
  4. Step 4: Simplify right side
    124,500x = 11,668,099,270.04
  5. Step 5: Solve for x
    x = 11,668,099,270.04/124,500
  6. Step 6: Final answer
    x = 93,719.67

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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.