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Finding the Fourth Proportional to 70,234.06, 105,351.20 and 28,681.06

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Solution

The fourth proportional to 70,234.06, 105,351.20 and 28,681.06 is: 43,021.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,234.06 : 105,351.20 = 28,681.06 : x
  2. Step 2: Convert to fraction form
    70,234.06/105,351.20 = 28,681.06/x
  3. Step 3: Cross multiply
    70,234.06x = 105,351.20 × 28,681.06
  4. Step 4: Simplify right side
    70,234.06x = 3,021,584,088.27
  5. Step 5: Solve for x
    x = 3,021,584,088.27/70,234.06
  6. Step 6: Final answer
    x = 43,021.63

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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.