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Finding the Fourth Proportional to 70,672.65, 105,967.43 and 28,554.06

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Solution

The fourth proportional to 70,672.65, 105,967.43 and 28,554.06 is: 42,814.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,672.65 : 105,967.43 = 28,554.06 : x
  2. Step 2: Convert to fraction form
    70,672.65/105,967.43 = 28,554.06/x
  3. Step 3: Cross multiply
    70,672.65x = 105,967.43 × 28,554.06
  4. Step 4: Simplify right side
    70,672.65x = 3,025,800,354.27
  5. Step 5: Solve for x
    x = 3,025,800,354.27/70,672.65
  6. Step 6: Final answer
    x = 42,814.30

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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.