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Finding the Fourth Proportional to 85,698.50, 128,469.01 and 29,525.25

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Solution

The fourth proportional to 85,698.50, 128,469.01 and 29,525.25 is: 44,260.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,698.50 : 128,469.01 = 29,525.25 : x
  2. Step 2: Convert to fraction form
    85,698.50/128,469.01 = 29,525.25/x
  3. Step 3: Cross multiply
    85,698.50x = 128,469.01 × 29,525.25
  4. Step 4: Simplify right side
    85,698.50x = 3,793,079,637.50
  5. Step 5: Solve for x
    x = 3,793,079,637.50/85,698.50
  6. Step 6: Final answer
    x = 44,260.75

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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.