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Finding the Fourth Proportional to 115,397.55, 172,965.09 and 48,796.11

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Solution

The fourth proportional to 115,397.55, 172,965.09 and 48,796.11 is: 73,138.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,397.55 : 172,965.09 = 48,796.11 : x
  2. Step 2: Convert to fraction form
    115,397.55/172,965.09 = 48,796.11/x
  3. Step 3: Cross multiply
    115,397.55x = 172,965.09 × 48,796.11
  4. Step 4: Simplify right side
    115,397.55x = 8,440,023,557.80
  5. Step 5: Solve for x
    x = 8,440,023,557.80/115,397.55
  6. Step 6: Final answer
    x = 73,138.67

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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.