Home / 121,842.72-168,142.48-68,127.58

Finding the Fourth Proportional to 121,842.72, 168,142.48 and 68,127.58

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Solution

The fourth proportional to 121,842.72, 168,142.48 and 68,127.58 is: 94,015.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,842.72 : 168,142.48 = 68,127.58 : x
  2. Step 2: Convert to fraction form
    121,842.72/168,142.48 = 68,127.58/x
  3. Step 3: Cross multiply
    121,842.72x = 168,142.48 × 68,127.58
  4. Step 4: Simplify right side
    121,842.72x = 11,455,140,257.60
  5. Step 5: Solve for x
    x = 11,455,140,257.60/121,842.72
  6. Step 6: Final answer
    x = 94,015.80

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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.