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Finding the Fourth Proportional to 279,707.81, 419,692.94 and 139,477.37

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Solution

The fourth proportional to 279,707.81, 419,692.94 and 139,477.37 is: 209,281.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,707.81 : 419,692.94 = 139,477.37 : x
  2. Step 2: Convert to fraction form
    279,707.81/419,692.94 = 139,477.37/x
  3. Step 3: Cross multiply
    279,707.81x = 419,692.94 × 139,477.37
  4. Step 4: Simplify right side
    279,707.81x = 58,537,666,781.38
  5. Step 5: Solve for x
    x = 58,537,666,781.38/279,707.81
  6. Step 6: Final answer
    x = 209,281.49

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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.