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Finding the Fourth Proportional to 85,849.80, 128,760.90 and 23,505.72

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Solution

The fourth proportional to 85,849.80, 128,760.90 and 23,505.72 is: 35,254.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,849.80 : 128,760.90 = 23,505.72 : x
  2. Step 2: Convert to fraction form
    85,849.80/128,760.90 = 23,505.72/x
  3. Step 3: Cross multiply
    85,849.80x = 128,760.90 × 23,505.72
  4. Step 4: Simplify right side
    85,849.80x = 3,026,617,662.35
  5. Step 5: Solve for x
    x = 3,026,617,662.35/85,849.80
  6. Step 6: Final answer
    x = 35,254.80

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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.