Home / 72,569.75-100,145.86-40,738.64

Finding the Fourth Proportional to 72,569.75, 100,145.86 and 40,738.64

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Solution

The fourth proportional to 72,569.75, 100,145.86 and 40,738.64 is: 56,219.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,569.75 : 100,145.86 = 40,738.64 : x
  2. Step 2: Convert to fraction form
    72,569.75/100,145.86 = 40,738.64/x
  3. Step 3: Cross multiply
    72,569.75x = 100,145.86 × 40,738.64
  4. Step 4: Simplify right side
    72,569.75x = 4,079,805,433.61
  5. Step 5: Solve for x
    x = 4,079,805,433.61/72,569.75
  6. Step 6: Final answer
    x = 56,219.10

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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.