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Finding the Fourth Proportional to 85,901.50, 128,870.77 and 25,924.96

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Solution

The fourth proportional to 85,901.50, 128,870.77 and 25,924.96 is: 38,893.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,901.50 : 128,870.77 = 25,924.96 : x
  2. Step 2: Convert to fraction form
    85,901.50/128,870.77 = 25,924.96/x
  3. Step 3: Cross multiply
    85,901.50x = 128,870.77 × 25,924.96
  4. Step 4: Simplify right side
    85,901.50x = 3,340,969,653.70
  5. Step 5: Solve for x
    x = 3,340,969,653.70/85,901.50
  6. Step 6: Final answer
    x = 38,893.03

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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.