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Finding the Fourth Proportional to 80,114.99, 120,162.02 and 20,955.20

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Solution

The fourth proportional to 80,114.99, 120,162.02 and 20,955.20 is: 31,430.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,114.99 : 120,162.02 = 20,955.20 : x
  2. Step 2: Convert to fraction form
    80,114.99/120,162.02 = 20,955.20/x
  3. Step 3: Cross multiply
    80,114.99x = 120,162.02 × 20,955.20
  4. Step 4: Simplify right side
    80,114.99x = 2,518,018,455.92
  5. Step 5: Solve for x
    x = 2,518,018,455.92/80,114.99
  6. Step 6: Final answer
    x = 31,430.06

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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.