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Finding the Fourth Proportional to 72,990.87, 109,437.69 and 26,237.67

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Solution

The fourth proportional to 72,990.87, 109,437.69 and 26,237.67 is: 39,339.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,990.87 : 109,437.69 = 26,237.67 : x
  2. Step 2: Convert to fraction form
    72,990.87/109,437.69 = 26,237.67/x
  3. Step 3: Cross multiply
    72,990.87x = 109,437.69 × 26,237.67
  4. Step 4: Simplify right side
    72,990.87x = 2,871,389,995.78
  5. Step 5: Solve for x
    x = 2,871,389,995.78/72,990.87
  6. Step 6: Final answer
    x = 39,339.03

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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.