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Finding the Fourth Proportional to 72,990.88, 109,486.32 and 17,586.88

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Solution

The fourth proportional to 72,990.88, 109,486.32 and 17,586.88 is: 26,380.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,990.88 : 109,486.32 = 17,586.88 : x
  2. Step 2: Convert to fraction form
    72,990.88/109,486.32 = 17,586.88/x
  3. Step 3: Cross multiply
    72,990.88x = 109,486.32 × 17,586.88
  4. Step 4: Simplify right side
    72,990.88x = 1,925,522,771.48
  5. Step 5: Solve for x
    x = 1,925,522,771.48/72,990.88
  6. Step 6: Final answer
    x = 26,380.32

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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.