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Finding the Fourth Proportional to 105,420.56, 158,129.92 and 43,047.28

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Solution

The fourth proportional to 105,420.56, 158,129.92 and 43,047.28 is: 64,570.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,420.56 : 158,129.92 = 43,047.28 : x
  2. Step 2: Convert to fraction form
    105,420.56/158,129.92 = 43,047.28/x
  3. Step 3: Cross multiply
    105,420.56x = 158,129.92 × 43,047.28
  4. Step 4: Simplify right side
    105,420.56x = 6,807,062,942.62
  5. Step 5: Solve for x
    x = 6,807,062,942.62/105,420.56
  6. Step 6: Final answer
    x = 64,570.54

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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.