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Finding the Fourth Proportional to 72,486.68, 108,728.64 and 29,783.03

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Solution

The fourth proportional to 72,486.68, 108,728.64 and 29,783.03 is: 44,673.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,486.68 : 108,728.64 = 29,783.03 : x
  2. Step 2: Convert to fraction form
    72,486.68/108,728.64 = 29,783.03/x
  3. Step 3: Cross multiply
    72,486.68x = 108,728.64 × 29,783.03
  4. Step 4: Simplify right side
    72,486.68x = 3,238,267,803.34
  5. Step 5: Solve for x
    x = 3,238,267,803.34/72,486.68
  6. Step 6: Final answer
    x = 44,673.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.