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Finding the Fourth Proportional to 74,704.61, 112,089.92 and 39,157.42

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Solution

The fourth proportional to 74,704.61, 112,089.92 and 39,157.42 is: 58,753.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,704.61 : 112,089.92 = 39,157.42 : x
  2. Step 2: Convert to fraction form
    74,704.61/112,089.92 = 39,157.42/x
  3. Step 3: Cross multiply
    74,704.61x = 112,089.92 × 39,157.42
  4. Step 4: Simplify right side
    74,704.61x = 4,389,152,075.21
  5. Step 5: Solve for x
    x = 4,389,152,075.21/74,704.61
  6. Step 6: Final answer
    x = 58,753.43

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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.