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Finding the Fourth Proportional to 79,966.43, 119,698.13 and 54,859.67

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Solution

The fourth proportional to 79,966.43, 119,698.13 and 54,859.67 is: 82,116.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,966.43 : 119,698.13 = 54,859.67 : x
  2. Step 2: Convert to fraction form
    79,966.43/119,698.13 = 54,859.67/x
  3. Step 3: Cross multiply
    79,966.43x = 119,698.13 × 54,859.67
  4. Step 4: Simplify right side
    79,966.43x = 6,566,599,038.63
  5. Step 5: Solve for x
    x = 6,566,599,038.63/79,966.43
  6. Step 6: Final answer
    x = 82,116.95

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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.