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Finding the Fourth Proportional to 66,035.91, 91,129.25 and 35,821.25

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Solution

The fourth proportional to 66,035.91, 91,129.25 and 35,821.25 is: 49,433.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,035.91 : 91,129.25 = 35,821.25 : x
  2. Step 2: Convert to fraction form
    66,035.91/91,129.25 = 35,821.25/x
  3. Step 3: Cross multiply
    66,035.91x = 91,129.25 × 35,821.25
  4. Step 4: Simplify right side
    66,035.91x = 3,264,363,280.47
  5. Step 5: Solve for x
    x = 3,264,363,280.47/66,035.91
  6. Step 6: Final answer
    x = 49,433.15

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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.