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Finding the Fourth Proportional to 100,419.76, 150,428.82 and 60,416.68

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Solution

The fourth proportional to 100,419.76, 150,428.82 and 60,416.68 is: 90,504.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,419.76 : 150,428.82 = 60,416.68 : x
  2. Step 2: Convert to fraction form
    100,419.76/150,428.82 = 60,416.68/x
  3. Step 3: Cross multiply
    100,419.76x = 150,428.82 × 60,416.68
  4. Step 4: Simplify right side
    100,419.76x = 9,088,409,880.72
  5. Step 5: Solve for x
    x = 9,088,409,880.72/100,419.76
  6. Step 6: Final answer
    x = 90,504.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.