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Finding the Fourth Proportional to 423,269.76, 634,924.08 and 107,729.40

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Solution

The fourth proportional to 423,269.76, 634,924.08 and 107,729.40 is: 161,599.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,269.76 : 634,924.08 = 107,729.40 : x
  2. Step 2: Convert to fraction form
    423,269.76/634,924.08 = 107,729.40/x
  3. Step 3: Cross multiply
    423,269.76x = 634,924.08 × 107,729.40
  4. Step 4: Simplify right side
    423,269.76x = 68,399,990,183.95
  5. Step 5: Solve for x
    x = 68,399,990,183.95/423,269.76
  6. Step 6: Final answer
    x = 161,599.05

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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.