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Finding the Fourth Proportional to 121,999.72, 168,360.44 and 68,289.68

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Solution

The fourth proportional to 121,999.72, 168,360.44 and 68,289.68 is: 94,240.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,999.72 : 168,360.44 = 68,289.68 : x
  2. Step 2: Convert to fraction form
    121,999.72/168,360.44 = 68,289.68/x
  3. Step 3: Cross multiply
    121,999.72x = 168,360.44 × 68,289.68
  4. Step 4: Simplify right side
    121,999.72x = 11,497,280,572.26
  5. Step 5: Solve for x
    x = 11,497,280,572.26/121,999.72
  6. Step 6: Final answer
    x = 94,240.22

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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.