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Finding the Fourth Proportional to 85,879.40, 118,514.29 and 47,641.45

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Solution

The fourth proportional to 85,879.40, 118,514.29 and 47,641.45 is: 65,745.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,879.40 : 118,514.29 = 47,641.45 : x
  2. Step 2: Convert to fraction form
    85,879.40/118,514.29 = 47,641.45/x
  3. Step 3: Cross multiply
    85,879.40x = 118,514.29 × 47,641.45
  4. Step 4: Simplify right side
    85,879.40x = 5,646,192,383.11
  5. Step 5: Solve for x
    x = 5,646,192,383.11/85,879.40
  6. Step 6: Final answer
    x = 65,745.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.