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Finding the Fourth Proportional to 71,703.33, 99,051.78 and 57,457.79

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Solution

The fourth proportional to 71,703.33, 99,051.78 and 57,457.79 is: 79,372.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,703.33 : 99,051.78 = 57,457.79 : x
  2. Step 2: Convert to fraction form
    71,703.33/99,051.78 = 57,457.79/x
  3. Step 3: Cross multiply
    71,703.33x = 99,051.78 × 57,457.79
  4. Step 4: Simplify right side
    71,703.33x = 5,691,296,154.88
  5. Step 5: Solve for x
    x = 5,691,296,154.88/71,703.33
  6. Step 6: Final answer
    x = 79,372.83

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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.