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Finding the Fourth Proportional to 143,374.53, 197,861.91 and 78,848.67

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Solution

The fourth proportional to 143,374.53, 197,861.91 and 78,848.67 is: 108,813.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,374.53 : 197,861.91 = 78,848.67 : x
  2. Step 2: Convert to fraction form
    143,374.53/197,861.91 = 78,848.67/x
  3. Step 3: Cross multiply
    143,374.53x = 197,861.91 × 78,848.67
  4. Step 4: Simplify right side
    143,374.53x = 15,601,148,447.16
  5. Step 5: Solve for x
    x = 15,601,148,447.16/143,374.53
  6. Step 6: Final answer
    x = 108,813.95

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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.