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Finding the Fourth Proportional to 74,820.40, 103,242.96 and 41,286.40

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Solution

The fourth proportional to 74,820.40, 103,242.96 and 41,286.40 is: 56,970.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,820.40 : 103,242.96 = 41,286.40 : x
  2. Step 2: Convert to fraction form
    74,820.40/103,242.96 = 41,286.40/x
  3. Step 3: Cross multiply
    74,820.40x = 103,242.96 × 41,286.40
  4. Step 4: Simplify right side
    74,820.40x = 4,262,530,143.74
  5. Step 5: Solve for x
    x = 4,262,530,143.74/74,820.40
  6. Step 6: Final answer
    x = 56,970.16

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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.