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Finding the Fourth Proportional to 72,291.98, 99,763.44 and 40,463.84

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Solution

The fourth proportional to 72,291.98, 99,763.44 and 40,463.84 is: 55,840.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,291.98 : 99,763.44 = 40,463.84 : x
  2. Step 2: Convert to fraction form
    72,291.98/99,763.44 = 40,463.84/x
  3. Step 3: Cross multiply
    72,291.98x = 99,763.44 × 40,463.84
  4. Step 4: Simplify right side
    72,291.98x = 4,036,811,874.01
  5. Step 5: Solve for x
    x = 4,036,811,874.01/72,291.98
  6. Step 6: Final answer
    x = 55,840.38

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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.