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Finding the Fourth Proportional to 72,160.87, 99,577.71 and 39,893.55

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Solution

The fourth proportional to 72,160.87, 99,577.71 and 39,893.55 is: 55,050.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,160.87 : 99,577.71 = 39,893.55 : x
  2. Step 2: Convert to fraction form
    72,160.87/99,577.71 = 39,893.55/x
  3. Step 3: Cross multiply
    72,160.87x = 99,577.71 × 39,893.55
  4. Step 4: Simplify right side
    72,160.87x = 3,972,508,352.77
  5. Step 5: Solve for x
    x = 3,972,508,352.77/72,160.87
  6. Step 6: Final answer
    x = 55,050.73

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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.