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Finding the Fourth Proportional to 111,998.40, 154,490.40 and 88,087.20

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Solution

The fourth proportional to 111,998.40, 154,490.40 and 88,087.20 is: 121,507.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,998.40 : 154,490.40 = 88,087.20 : x
  2. Step 2: Convert to fraction form
    111,998.40/154,490.40 = 88,087.20/x
  3. Step 3: Cross multiply
    111,998.40x = 154,490.40 × 88,087.20
  4. Step 4: Simplify right side
    111,998.40x = 13,608,626,762.88
  5. Step 5: Solve for x
    x = 13,608,626,762.88/111,998.40
  6. Step 6: Final answer
    x = 121,507.33

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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.