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Finding the Fourth Proportional to 121,493.70, 182,240.55 and 86,064.30

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Solution

The fourth proportional to 121,493.70, 182,240.55 and 86,064.30 is: 129,096.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,493.70 : 182,240.55 = 86,064.30 : x
  2. Step 2: Convert to fraction form
    121,493.70/182,240.55 = 86,064.30/x
  3. Step 3: Cross multiply
    121,493.70x = 182,240.55 × 86,064.30
  4. Step 4: Simplify right side
    121,493.70x = 15,684,405,367.37
  5. Step 5: Solve for x
    x = 15,684,405,367.37/121,493.70
  6. Step 6: Final answer
    x = 129,096.45

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1.5x scale

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.