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Finding the Fourth Proportional to 79,643.78, 119,466.61 and 20,477.87

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Solution

The fourth proportional to 79,643.78, 119,466.61 and 20,477.87 is: 30,717.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,643.78 : 119,466.61 = 20,477.87 : x
  2. Step 2: Convert to fraction form
    79,643.78/119,466.61 = 20,477.87/x
  3. Step 3: Cross multiply
    79,643.78x = 119,466.61 × 20,477.87
  4. Step 4: Simplify right side
    79,643.78x = 2,446,421,708.92
  5. Step 5: Solve for x
    x = 2,446,421,708.92/79,643.78
  6. Step 6: Final answer
    x = 30,717.05

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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.