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Finding the Fourth Proportional to 95,431.80, 143,163.90 and 28,871.40

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Solution

The fourth proportional to 95,431.80, 143,163.90 and 28,871.40 is: 43,312.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,431.80 : 143,163.90 = 28,871.40 : x
  2. Step 2: Convert to fraction form
    95,431.80/143,163.90 = 28,871.40/x
  3. Step 3: Cross multiply
    95,431.80x = 143,163.90 × 28,871.40
  4. Step 4: Simplify right side
    95,431.80x = 4,133,342,222.46
  5. Step 5: Solve for x
    x = 4,133,342,222.46/95,431.80
  6. Step 6: Final answer
    x = 43,312.00

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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.