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Finding the Fourth Proportional to 72,555.88, 100,121.62 and 40,718.63

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Solution

The fourth proportional to 72,555.88, 100,121.62 and 40,718.63 is: 56,188.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,555.88 : 100,121.62 = 40,718.63 : x
  2. Step 2: Convert to fraction form
    72,555.88/100,121.62 = 40,718.63/x
  3. Step 3: Cross multiply
    72,555.88x = 100,121.62 × 40,718.63
  4. Step 4: Simplify right side
    72,555.88x = 4,076,814,597.38
  5. Step 5: Solve for x
    x = 4,076,814,597.38/72,555.88
  6. Step 6: Final answer
    x = 56,188.62

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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.