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Finding the Fourth Proportional to 85,840.10, 128,723.70 and 41,480.45

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Solution

The fourth proportional to 85,840.10, 128,723.70 and 41,480.45 is: 62,203.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840.10 : 128,723.70 = 41,480.45 : x
  2. Step 2: Convert to fraction form
    85,840.10/128,723.70 = 41,480.45/x
  3. Step 3: Cross multiply
    85,840.10x = 128,723.70 × 41,480.45
  4. Step 4: Simplify right side
    85,840.10x = 5,339,517,001.67
  5. Step 5: Solve for x
    x = 5,339,517,001.67/85,840.10
  6. Step 6: Final answer
    x = 62,203.06

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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.