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Finding the Fourth Proportional to 85,121.34, 127,702.69 and 25,958.06

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Solution

The fourth proportional to 85,121.34, 127,702.69 and 25,958.06 is: 38,943.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,121.34 : 127,702.69 = 25,958.06 : x
  2. Step 2: Convert to fraction form
    85,121.34/127,702.69 = 25,958.06/x
  3. Step 3: Cross multiply
    85,121.34x = 127,702.69 × 25,958.06
  4. Step 4: Simplify right side
    85,121.34x = 3,314,914,089.18
  5. Step 5: Solve for x
    x = 3,314,914,089.18/85,121.34
  6. Step 6: Final answer
    x = 38,943.40

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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.