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Finding the Fourth Proportional to 143,694, 215,731.76 and 122,768.46

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Solution

The fourth proportional to 143,694, 215,731.76 and 122,768.46 is: 184,315.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,694 : 215,731.76 = 122,768.46 : x
  2. Step 2: Convert to fraction form
    143,694/215,731.76 = 122,768.46/x
  3. Step 3: Cross multiply
    143,694x = 215,731.76 × 122,768.46
  4. Step 4: Simplify right side
    143,694x = 26,485,055,334.45
  5. Step 5: Solve for x
    x = 26,485,055,334.45/143,694
  6. Step 6: Final answer
    x = 184,315.67

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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.