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Finding the Fourth Proportional to 107,813.70, 148,682.00 and 85,206.70

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Solution

The fourth proportional to 107,813.70, 148,682.00 and 85,206.70 is: 117,505.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,813.70 : 148,682.00 = 85,206.70 : x
  2. Step 2: Convert to fraction form
    107,813.70/148,682.00 = 85,206.70/x
  3. Step 3: Cross multiply
    107,813.70x = 148,682.00 × 85,206.70
  4. Step 4: Simplify right side
    107,813.70x = 12,668,702,143.37
  5. Step 5: Solve for x
    x = 12,668,702,143.37/107,813.70
  6. Step 6: Final answer
    x = 117,505.49

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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.