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Finding the Fourth Proportional to 72,480.23, 100,023.44 and 40,648.44

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Solution

The fourth proportional to 72,480.23, 100,023.44 and 40,648.44 is: 56,095.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,480.23 : 100,023.44 = 40,648.44 : x
  2. Step 2: Convert to fraction form
    72,480.23/100,023.44 = 40,648.44/x
  3. Step 3: Cross multiply
    72,480.23x = 100,023.44 × 40,648.44
  4. Step 4: Simplify right side
    72,480.23x = 4,065,796,596.19
  5. Step 5: Solve for x
    x = 4,065,796,596.19/72,480.23
  6. Step 6: Final answer
    x = 56,095.25

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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.