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Finding the Fourth Proportional to 104,297.81, 143,930.99 and 56,551.15

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Solution

The fourth proportional to 104,297.81, 143,930.99 and 56,551.15 is: 78,040.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,297.81 : 143,930.99 = 56,551.15 : x
  2. Step 2: Convert to fraction form
    104,297.81/143,930.99 = 56,551.15/x
  3. Step 3: Cross multiply
    104,297.81x = 143,930.99 × 56,551.15
  4. Step 4: Simplify right side
    104,297.81x = 8,139,462,362.56
  5. Step 5: Solve for x
    x = 8,139,462,362.56/104,297.81
  6. Step 6: Final answer
    x = 78,040.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.