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Finding the Fourth Proportional to 71,782.52, 99,059.90 and 39,958.92

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Solution

The fourth proportional to 71,782.52, 99,059.90 and 39,958.92 is: 55,143.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,782.52 : 99,059.90 = 39,958.92 : x
  2. Step 2: Convert to fraction form
    71,782.52/99,059.90 = 39,958.92/x
  3. Step 3: Cross multiply
    71,782.52x = 99,059.90 × 39,958.92
  4. Step 4: Simplify right side
    71,782.52x = 3,958,326,419.51
  5. Step 5: Solve for x
    x = 3,958,326,419.51/71,782.52
  6. Step 6: Final answer
    x = 55,143.32

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1.5x scale

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.