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Finding the Fourth Proportional to 72,739.01, 100,389.51 and 40,914.06

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Solution

The fourth proportional to 72,739.01, 100,389.51 and 40,914.06 is: 56,466.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,739.01 : 100,389.51 = 40,914.06 : x
  2. Step 2: Convert to fraction form
    72,739.01/100,389.51 = 40,914.06/x
  3. Step 3: Cross multiply
    72,739.01x = 100,389.51 × 40,914.06
  4. Step 4: Simplify right side
    72,739.01x = 4,107,342,435.51
  5. Step 5: Solve for x
    x = 4,107,342,435.51/72,739.01
  6. Step 6: Final answer
    x = 56,466.85

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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.