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Finding the Fourth Proportional to 45,368.70, 68,055.73 and 13,779.81

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Solution

The fourth proportional to 45,368.70, 68,055.73 and 13,779.81 is: 20,670.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,368.70 : 68,055.73 = 13,779.81 : x
  2. Step 2: Convert to fraction form
    45,368.70/68,055.73 = 13,779.81/x
  3. Step 3: Cross multiply
    45,368.70x = 68,055.73 × 13,779.81
  4. Step 4: Simplify right side
    45,368.70x = 937,795,028.81
  5. Step 5: Solve for x
    x = 937,795,028.81/45,368.70
  6. Step 6: Final answer
    x = 20,670.53

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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.