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Finding the Fourth Proportional to 116,561.80, 174,929.10 and 77,105.80

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Solution

The fourth proportional to 116,561.80, 174,929.10 and 77,105.80 is: 115,715.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,561.80 : 174,929.10 = 77,105.80 : x
  2. Step 2: Convert to fraction form
    116,561.80/174,929.10 = 77,105.80/x
  3. Step 3: Cross multiply
    116,561.80x = 174,929.10 × 77,105.80
  4. Step 4: Simplify right side
    116,561.80x = 13,488,048,198.78
  5. Step 5: Solve for x
    x = 13,488,048,198.78/116,561.80
  6. Step 6: Final answer
    x = 115,715.85

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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.