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Finding the Fourth Proportional to 85,123.80, 127,706.40 and 25,960.68

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Solution

The fourth proportional to 85,123.80, 127,706.40 and 25,960.68 is: 38,947.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,123.80 : 127,706.40 = 25,960.68 : x
  2. Step 2: Convert to fraction form
    85,123.80/127,706.40 = 25,960.68/x
  3. Step 3: Cross multiply
    85,123.80x = 127,706.40 × 25,960.68
  4. Step 4: Simplify right side
    85,123.80x = 3,315,344,984.35
  5. Step 5: Solve for x
    x = 3,315,344,984.35/85,123.80
  6. Step 6: Final answer
    x = 38,947.33

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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.