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Finding the Fourth Proportional to 194,409.60, 290,836.80 and 168,403.20

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Solution

The fourth proportional to 194,409.60, 290,836.80 and 168,403.20 is: 251,931.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,409.60 : 290,836.80 = 168,403.20 : x
  2. Step 2: Convert to fraction form
    194,409.60/290,836.80 = 168,403.20/x
  3. Step 3: Cross multiply
    194,409.60x = 290,836.80 × 168,403.20
  4. Step 4: Simplify right side
    194,409.60x = 48,977,847,797.76
  5. Step 5: Solve for x
    x = 48,977,847,797.76/194,409.60
  6. Step 6: Final answer
    x = 251,931.22

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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.