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Finding the Fourth Proportional to 74,570.62, 102,909.90 and 42,745.54

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Solution

The fourth proportional to 74,570.62, 102,909.90 and 42,745.54 is: 58,990.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,570.62 : 102,909.90 = 42,745.54 : x
  2. Step 2: Convert to fraction form
    74,570.62/102,909.90 = 42,745.54/x
  3. Step 3: Cross multiply
    74,570.62x = 102,909.90 × 42,745.54
  4. Step 4: Simplify right side
    74,570.62x = 4,398,939,246.85
  5. Step 5: Solve for x
    x = 4,398,939,246.85/74,570.62
  6. Step 6: Final answer
    x = 58,990.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.