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Finding the Fourth Proportional to 74,424.80, 111,637.02 and 19,020.80

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Solution

The fourth proportional to 74,424.80, 111,637.02 and 19,020.80 is: 28,531.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,424.80 : 111,637.02 = 19,020.80 : x
  2. Step 2: Convert to fraction form
    74,424.80/111,637.02 = 19,020.80/x
  3. Step 3: Cross multiply
    74,424.80x = 111,637.02 × 19,020.80
  4. Step 4: Simplify right side
    74,424.80x = 2,123,425,430.02
  5. Step 5: Solve for x
    x = 2,123,425,430.02/74,424.80
  6. Step 6: Final answer
    x = 28,531.15

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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.