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Finding the Fourth Proportional to 88,990.20, 133,485.30 and 53,998.20

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Solution

The fourth proportional to 88,990.20, 133,485.30 and 53,998.20 is: 80,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,990.20 : 133,485.30 = 53,998.20 : x
  2. Step 2: Convert to fraction form
    88,990.20/133,485.30 = 53,998.20/x
  3. Step 3: Cross multiply
    88,990.20x = 133,485.30 × 53,998.20
  4. Step 4: Simplify right side
    88,990.20x = 7,207,965,926.46
  5. Step 5: Solve for x
    x = 7,207,965,926.46/88,990.20
  6. Step 6: Final answer
    x = 80,997.30

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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.