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Finding the Fourth Proportional to 84,968.60, 117,288.48 and 63,809

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Solution

The fourth proportional to 84,968.60, 117,288.48 and 63,809 is: 88,080.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,968.60 : 117,288.48 = 63,809 : x
  2. Step 2: Convert to fraction form
    84,968.60/117,288.48 = 63,809/x
  3. Step 3: Cross multiply
    84,968.60x = 117,288.48 × 63,809
  4. Step 4: Simplify right side
    84,968.60x = 7,484,060,620.32
  5. Step 5: Solve for x
    x = 7,484,060,620.32/84,968.60
  6. Step 6: Final answer
    x = 88,080.31

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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.