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Finding the Fourth Proportional to 72,638, 100,245.91 and 44,349.16

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Solution

The fourth proportional to 72,638, 100,245.91 and 44,349.16 is: 61,205.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,638 : 100,245.91 = 44,349.16 : x
  2. Step 2: Convert to fraction form
    72,638/100,245.91 = 44,349.16/x
  3. Step 3: Cross multiply
    72,638x = 100,245.91 × 44,349.16
  4. Step 4: Simplify right side
    72,638x = 4,445,821,289.83
  5. Step 5: Solve for x
    x = 4,445,821,289.83/72,638
  6. Step 6: Final answer
    x = 61,205.17

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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.