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Finding the Fourth Proportional to 123,401.70, 185,102.55 and 113,778.90

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Solution

The fourth proportional to 123,401.70, 185,102.55 and 113,778.90 is: 170,668.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,401.70 : 185,102.55 = 113,778.90 : x
  2. Step 2: Convert to fraction form
    123,401.70/185,102.55 = 113,778.90/x
  3. Step 3: Cross multiply
    123,401.70x = 185,102.55 × 113,778.90
  4. Step 4: Simplify right side
    123,401.70x = 21,060,764,526.20
  5. Step 5: Solve for x
    x = 21,060,764,526.20/123,401.70
  6. Step 6: Final answer
    x = 170,668.35

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1.5x scale

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.