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Finding the Fourth Proportional to 85,668.57, 118,206.21 and 55,449.69

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Solution

The fourth proportional to 85,668.57, 118,206.21 and 55,449.69 is: 76,509.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,668.57 : 118,206.21 = 55,449.69 : x
  2. Step 2: Convert to fraction form
    85,668.57/118,206.21 = 55,449.69/x
  3. Step 3: Cross multiply
    85,668.57x = 118,206.21 × 55,449.69
  4. Step 4: Simplify right side
    85,668.57x = 6,554,497,700.57
  5. Step 5: Solve for x
    x = 6,554,497,700.57/85,668.57
  6. Step 6: Final answer
    x = 76,509.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.