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Finding the Fourth Proportional to 124,873.29, 172,317.78 and 71,157.87

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Solution

The fourth proportional to 124,873.29, 172,317.78 and 71,157.87 is: 98,193.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,873.29 : 172,317.78 = 71,157.87 : x
  2. Step 2: Convert to fraction form
    124,873.29/172,317.78 = 71,157.87/x
  3. Step 3: Cross multiply
    124,873.29x = 172,317.78 × 71,157.87
  4. Step 4: Simplify right side
    124,873.29x = 12,261,766,187.93
  5. Step 5: Solve for x
    x = 12,261,766,187.93/124,873.29
  6. Step 6: Final answer
    x = 98,193.67

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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.