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Finding the Fourth Proportional to 79,950.19, 119,939.91 and 39,990.10

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Solution

The fourth proportional to 79,950.19, 119,939.91 and 39,990.10 is: 59,992.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,950.19 : 119,939.91 = 39,990.10 : x
  2. Step 2: Convert to fraction form
    79,950.19/119,939.91 = 39,990.10/x
  3. Step 3: Cross multiply
    79,950.19x = 119,939.91 × 39,990.10
  4. Step 4: Simplify right side
    79,950.19x = 4,796,408,994.89
  5. Step 5: Solve for x
    x = 4,796,408,994.89/79,950.19
  6. Step 6: Final answer
    x = 59,992.47

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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.