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Finding the Fourth Proportional to 121,703.60, 182,382.60 and 89,865.20

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Solution

The fourth proportional to 121,703.60, 182,382.60 and 89,865.20 is: 134,670.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,703.60 : 182,382.60 = 89,865.20 : x
  2. Step 2: Convert to fraction form
    121,703.60/182,382.60 = 89,865.20/x
  3. Step 3: Cross multiply
    121,703.60x = 182,382.60 × 89,865.20
  4. Step 4: Simplify right side
    121,703.60x = 16,389,848,825.52
  5. Step 5: Solve for x
    x = 16,389,848,825.52/121,703.60
  6. Step 6: Final answer
    x = 134,670.21

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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.