Home / 72,669.45-100,283.21-40,838.28

Finding the Fourth Proportional to 72,669.45, 100,283.21 and 40,838.28

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Solution

The fourth proportional to 72,669.45, 100,283.21 and 40,838.28 is: 56,356.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,669.45 : 100,283.21 = 40,838.28 : x
  2. Step 2: Convert to fraction form
    72,669.45/100,283.21 = 40,838.28/x
  3. Step 3: Cross multiply
    72,669.45x = 100,283.21 × 40,838.28
  4. Step 4: Simplify right side
    72,669.45x = 4,095,393,611.88
  5. Step 5: Solve for x
    x = 4,095,393,611.88/72,669.45
  6. Step 6: Final answer
    x = 56,356.47

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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.