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Finding the Fourth Proportional to 85,237, 127,879.80 and 29,089.60

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Solution

The fourth proportional to 85,237, 127,879.80 and 29,089.60 is: 43,642.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,237 : 127,879.80 = 29,089.60 : x
  2. Step 2: Convert to fraction form
    85,237/127,879.80 = 29,089.60/x
  3. Step 3: Cross multiply
    85,237x = 127,879.80 × 29,089.60
  4. Step 4: Simplify right side
    85,237x = 3,719,972,230.08
  5. Step 5: Solve for x
    x = 3,719,972,230.08/85,237
  6. Step 6: Final answer
    x = 43,642.69

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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.