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Finding the Fourth Proportional to 140,051.79, 210,090.75 and 55,791.54

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Solution

The fourth proportional to 140,051.79, 210,090.75 and 55,791.54 is: 83,692.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,051.79 : 210,090.75 = 55,791.54 : x
  2. Step 2: Convert to fraction form
    140,051.79/210,090.75 = 55,791.54/x
  3. Step 3: Cross multiply
    140,051.79x = 210,090.75 × 55,791.54
  4. Step 4: Simplify right side
    140,051.79x = 11,721,286,482.26
  5. Step 5: Solve for x
    x = 11,721,286,482.26/140,051.79
  6. Step 6: Final answer
    x = 83,692.51

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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.