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Finding the Fourth Proportional to 74,853.89, 103,294.42 and 40,855.78

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Solution

The fourth proportional to 74,853.89, 103,294.42 and 40,855.78 is: 56,378.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,853.89 : 103,294.42 = 40,855.78 : x
  2. Step 2: Convert to fraction form
    74,853.89/103,294.42 = 40,855.78/x
  3. Step 3: Cross multiply
    74,853.89x = 103,294.42 × 40,855.78
  4. Step 4: Simplify right side
    74,853.89x = 4,220,173,738.37
  5. Step 5: Solve for x
    x = 4,220,173,738.37/74,853.89
  6. Step 6: Final answer
    x = 56,378.82

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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.