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Finding the Fourth Proportional to 85,633.48, 118,287.15 and 65,736.24

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Solution

The fourth proportional to 85,633.48, 118,287.15 and 65,736.24 is: 90,802.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,633.48 : 118,287.15 = 65,736.24 : x
  2. Step 2: Convert to fraction form
    85,633.48/118,287.15 = 65,736.24/x
  3. Step 3: Cross multiply
    85,633.48x = 118,287.15 × 65,736.24
  4. Step 4: Simplify right side
    85,633.48x = 7,775,752,481.32
  5. Step 5: Solve for x
    x = 7,775,752,481.32/85,633.48
  6. Step 6: Final answer
    x = 90,802.72

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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.