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Finding the Fourth Proportional to 85,902.51, 128,865.90 and 26,744.16

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Solution

The fourth proportional to 85,902.51, 128,865.90 and 26,744.16 is: 40,120.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,902.51 : 128,865.90 = 26,744.16 : x
  2. Step 2: Convert to fraction form
    85,902.51/128,865.90 = 26,744.16/x
  3. Step 3: Cross multiply
    85,902.51x = 128,865.90 × 26,744.16
  4. Step 4: Simplify right side
    85,902.51x = 3,446,410,248.14
  5. Step 5: Solve for x
    x = 3,446,410,248.14/85,902.51
  6. Step 6: Final answer
    x = 40,120.02

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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.