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Finding the Fourth Proportional to 74,493.90, 111,870.45 and 39,501.90

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Solution

The fourth proportional to 74,493.90, 111,870.45 and 39,501.90 is: 59,321.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,493.90 : 111,870.45 = 39,501.90 : x
  2. Step 2: Convert to fraction form
    74,493.90/111,870.45 = 39,501.90/x
  3. Step 3: Cross multiply
    74,493.90x = 111,870.45 × 39,501.90
  4. Step 4: Simplify right side
    74,493.90x = 4,419,095,328.86
  5. Step 5: Solve for x
    x = 4,419,095,328.86/74,493.90
  6. Step 6: Final answer
    x = 59,321.57

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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.