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Finding the Fourth Proportional to 85,967, 128,951.33 and 25,995.95

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Solution

The fourth proportional to 85,967, 128,951.33 and 25,995.95 is: 38,994.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,967 : 128,951.33 = 25,995.95 : x
  2. Step 2: Convert to fraction form
    85,967/128,951.33 = 25,995.95/x
  3. Step 3: Cross multiply
    85,967x = 128,951.33 × 25,995.95
  4. Step 4: Simplify right side
    85,967x = 3,352,212,327.11
  5. Step 5: Solve for x
    x = 3,352,212,327.11/85,967
  6. Step 6: Final answer
    x = 38,994.18

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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.