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Finding the Fourth Proportional to 111,998.40, 168,022.50 and 40,920.90

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Solution

The fourth proportional to 111,998.40, 168,022.50 and 40,920.90 is: 61,390.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,998.40 : 168,022.50 = 40,920.90 : x
  2. Step 2: Convert to fraction form
    111,998.40/168,022.50 = 40,920.90/x
  3. Step 3: Cross multiply
    111,998.40x = 168,022.50 × 40,920.90
  4. Step 4: Simplify right side
    111,998.40x = 6,875,631,920.25
  5. Step 5: Solve for x
    x = 6,875,631,920.25/111,998.40
  6. Step 6: Final answer
    x = 61,390.45

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1.5x scale

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.