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Finding the Fourth Proportional to 72,977.33, 100,711.55 and 41,145.55

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Solution

The fourth proportional to 72,977.33, 100,711.55 and 41,145.55 is: 56,782.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,977.33 : 100,711.55 = 41,145.55 : x
  2. Step 2: Convert to fraction form
    72,977.33/100,711.55 = 41,145.55/x
  3. Step 3: Cross multiply
    72,977.33x = 100,711.55 × 41,145.55
  4. Step 4: Simplify right side
    72,977.33x = 4,143,831,967.19
  5. Step 5: Solve for x
    x = 4,143,831,967.19/72,977.33
  6. Step 6: Final answer
    x = 56,782.45

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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.