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Finding the Fourth Proportional to 72,785.36, 100,445.64 and 44,506.64

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Solution

The fourth proportional to 72,785.36, 100,445.64 and 44,506.64 is: 61,420.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,785.36 : 100,445.64 = 44,506.64 : x
  2. Step 2: Convert to fraction form
    72,785.36/100,445.64 = 44,506.64/x
  3. Step 3: Cross multiply
    72,785.36x = 100,445.64 × 44,506.64
  4. Step 4: Simplify right side
    72,785.36x = 4,470,497,939.05
  5. Step 5: Solve for x
    x = 4,470,497,939.05/72,785.36
  6. Step 6: Final answer
    x = 61,420.29

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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.