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Finding the Fourth Proportional to 71,669.31, 99,004.80 and 57,423.75

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Solution

The fourth proportional to 71,669.31, 99,004.80 and 57,423.75 is: 79,325.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,669.31 : 99,004.80 = 57,423.75 : x
  2. Step 2: Convert to fraction form
    71,669.31/99,004.80 = 57,423.75/x
  3. Step 3: Cross multiply
    71,669.31x = 99,004.80 × 57,423.75
  4. Step 4: Simplify right side
    71,669.31x = 5,685,226,884
  5. Step 5: Solve for x
    x = 5,685,226,884/71,669.31
  6. Step 6: Final answer
    x = 79,325.82

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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.