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Finding the Fourth Proportional to 121,899.96, 168,239.88 and 74,144.07

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Solution

The fourth proportional to 121,899.96, 168,239.88 and 74,144.07 is: 102,329.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,899.96 : 168,239.88 = 74,144.07 : x
  2. Step 2: Convert to fraction form
    121,899.96/168,239.88 = 74,144.07/x
  3. Step 3: Cross multiply
    121,899.96x = 168,239.88 × 74,144.07
  4. Step 4: Simplify right side
    121,899.96x = 12,473,989,439.51
  5. Step 5: Solve for x
    x = 12,473,989,439.51/121,899.96
  6. Step 6: Final answer
    x = 102,329.73

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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.