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Finding the Fourth Proportional to 123,328, 170,193.86 and 66,740.59

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Solution

The fourth proportional to 123,328, 170,193.86 and 66,740.59 is: 92,102.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,328 : 170,193.86 = 66,740.59 : x
  2. Step 2: Convert to fraction form
    123,328/170,193.86 = 66,740.59/x
  3. Step 3: Cross multiply
    123,328x = 170,193.86 × 66,740.59
  4. Step 4: Simplify right side
    123,328x = 11,358,838,630.78
  5. Step 5: Solve for x
    x = 11,358,838,630.78/123,328
  6. Step 6: Final answer
    x = 92,102.67

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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.