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Finding the Fourth Proportional to 45,402.51, 68,103.03 and 20,424.89

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Solution

The fourth proportional to 45,402.51, 68,103.03 and 20,424.89 is: 30,637.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,402.51 : 68,103.03 = 20,424.89 : x
  2. Step 2: Convert to fraction form
    45,402.51/68,103.03 = 20,424.89/x
  3. Step 3: Cross multiply
    45,402.51x = 68,103.03 × 20,424.89
  4. Step 4: Simplify right side
    45,402.51x = 1,390,997,194.37
  5. Step 5: Solve for x
    x = 1,390,997,194.37/45,402.51
  6. Step 6: Final answer
    x = 30,637.01

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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.