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Finding the Fourth Proportional to 121,440.57, 182,015.51 and 85,848.05

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Solution

The fourth proportional to 121,440.57, 182,015.51 and 85,848.05 is: 128,669.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,440.57 : 182,015.51 = 85,848.05 : x
  2. Step 2: Convert to fraction form
    121,440.57/182,015.51 = 85,848.05/x
  3. Step 3: Cross multiply
    121,440.57x = 182,015.51 × 85,848.05
  4. Step 4: Simplify right side
    121,440.57x = 15,625,676,629.05
  5. Step 5: Solve for x
    x = 15,625,676,629.05/121,440.57
  6. Step 6: Final answer
    x = 128,669.33

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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.