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Finding the Fourth Proportional to 199,658.84, 299,559.54 and 85,758.80

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Solution

The fourth proportional to 199,658.84, 299,559.54 and 85,758.80 is: 128,668.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,658.84 : 299,559.54 = 85,758.80 : x
  2. Step 2: Convert to fraction form
    199,658.84/299,559.54 = 85,758.80/x
  3. Step 3: Cross multiply
    199,658.84x = 299,559.54 × 85,758.80
  4. Step 4: Simplify right side
    199,658.84x = 25,689,866,678.95
  5. Step 5: Solve for x
    x = 25,689,866,678.95/199,658.84
  6. Step 6: Final answer
    x = 128,668.82

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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.