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Finding the Fourth Proportional to 70,187.66, 105,250.23 and 20,255.89

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Solution

The fourth proportional to 70,187.66, 105,250.23 and 20,255.89 is: 30,374.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,187.66 : 105,250.23 = 20,255.89 : x
  2. Step 2: Convert to fraction form
    70,187.66/105,250.23 = 20,255.89/x
  3. Step 3: Cross multiply
    70,187.66x = 105,250.23 × 20,255.89
  4. Step 4: Simplify right side
    70,187.66x = 2,131,937,223.34
  5. Step 5: Solve for x
    x = 2,131,937,223.34/70,187.66
  6. Step 6: Final answer
    x = 30,374.81

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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.