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Finding the Fourth Proportional to 99,993.96, 149,718.60 and 70,367.40

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Solution

The fourth proportional to 99,993.96, 149,718.60 and 70,367.40 is: 105,359.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,993.96 : 149,718.60 = 70,367.40 : x
  2. Step 2: Convert to fraction form
    99,993.96/149,718.60 = 70,367.40/x
  3. Step 3: Cross multiply
    99,993.96x = 149,718.60 × 70,367.40
  4. Step 4: Simplify right side
    99,993.96x = 10,535,308,613.64
  5. Step 5: Solve for x
    x = 10,535,308,613.64/99,993.96
  6. Step 6: Final answer
    x = 105,359.45

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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.