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Finding the Fourth Proportional to 143,576.88, 198,310.20 and 105,281.16

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Solution

The fourth proportional to 143,576.88, 198,310.20 and 105,281.16 is: 145,415.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,576.88 : 198,310.20 = 105,281.16 : x
  2. Step 2: Convert to fraction form
    143,576.88/198,310.20 = 105,281.16/x
  3. Step 3: Cross multiply
    143,576.88x = 198,310.20 × 105,281.16
  4. Step 4: Simplify right side
    143,576.88x = 20,878,327,895.83
  5. Step 5: Solve for x
    x = 20,878,327,895.83/143,576.88
  6. Step 6: Final answer
    x = 145,415.67

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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.