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Finding the Fourth Proportional to 72,345.96, 99,770.67 and 49,644.90

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Solution

The fourth proportional to 72,345.96, 99,770.67 and 49,644.90 is: 68,464.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,345.96 : 99,770.67 = 49,644.90 : x
  2. Step 2: Convert to fraction form
    72,345.96/99,770.67 = 49,644.90/x
  3. Step 3: Cross multiply
    72,345.96x = 99,770.67 × 49,644.90
  4. Step 4: Simplify right side
    72,345.96x = 4,953,104,935.08
  5. Step 5: Solve for x
    x = 4,953,104,935.08/72,345.96
  6. Step 6: Final answer
    x = 68,464.15

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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.