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Finding the Fourth Proportional to 198,362.40, 273,739.80 and 108,938.40

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Solution

The fourth proportional to 198,362.40, 273,739.80 and 108,938.40 is: 150,334.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,362.40 : 273,739.80 = 108,938.40 : x
  2. Step 2: Convert to fraction form
    198,362.40/273,739.80 = 108,938.40/x
  3. Step 3: Cross multiply
    198,362.40x = 273,739.80 × 108,938.40
  4. Step 4: Simplify right side
    198,362.40x = 29,820,775,828.32
  5. Step 5: Solve for x
    x = 29,820,775,828.32/198,362.40
  6. Step 6: Final answer
    x = 150,334.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.