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Finding the Fourth Proportional to 72,990.28, 109,485.18 and 17,586.28

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Solution

The fourth proportional to 72,990.28, 109,485.18 and 17,586.28 is: 26,379.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,990.28 : 109,485.18 = 17,586.28 : x
  2. Step 2: Convert to fraction form
    72,990.28/109,485.18 = 17,586.28/x
  3. Step 3: Cross multiply
    72,990.28x = 109,485.18 × 17,586.28
  4. Step 4: Simplify right side
    72,990.28x = 1,925,437,031.33
  5. Step 5: Solve for x
    x = 1,925,437,031.33/72,990.28
  6. Step 6: Final answer
    x = 26,379.36

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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.