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Finding the Fourth Proportional to 386,131.99, 579,223.91 and 105,651.67

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Solution

The fourth proportional to 386,131.99, 579,223.91 and 105,651.67 is: 158,484.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,131.99 : 579,223.91 = 105,651.67 : x
  2. Step 2: Convert to fraction form
    386,131.99/579,223.91 = 105,651.67/x
  3. Step 3: Cross multiply
    386,131.99x = 579,223.91 × 105,651.67
  4. Step 4: Simplify right side
    386,131.99x = 61,195,973,395.43
  5. Step 5: Solve for x
    x = 61,195,973,395.43/386,131.99
  6. Step 6: Final answer
    x = 158,484.60

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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.