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Finding the Fourth Proportional to 74,440.76, 102,728.89 and 40,449.25

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Solution

The fourth proportional to 74,440.76, 102,728.89 and 40,449.25 is: 55,820.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,440.76 : 102,728.89 = 40,449.25 : x
  2. Step 2: Convert to fraction form
    74,440.76/102,728.89 = 40,449.25/x
  3. Step 3: Cross multiply
    74,440.76x = 102,728.89 × 40,449.25
  4. Step 4: Simplify right side
    74,440.76x = 4,155,306,217.15
  5. Step 5: Solve for x
    x = 4,155,306,217.15/74,440.76
  6. Step 6: Final answer
    x = 55,820.31

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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.