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Finding the Fourth Proportional to 112,987.80, 169,481.70 and 68,701.32

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Solution

The fourth proportional to 112,987.80, 169,481.70 and 68,701.32 is: 103,051.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,987.80 : 169,481.70 = 68,701.32 : x
  2. Step 2: Convert to fraction form
    112,987.80/169,481.70 = 68,701.32/x
  3. Step 3: Cross multiply
    112,987.80x = 169,481.70 × 68,701.32
  4. Step 4: Simplify right side
    112,987.80x = 11,643,616,505.84
  5. Step 5: Solve for x
    x = 11,643,616,505.84/112,987.80
  6. Step 6: Final answer
    x = 103,051.98

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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.