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Finding the Fourth Proportional to 121,014.40, 181,521.60 and 68,526.40

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Solution

The fourth proportional to 121,014.40, 181,521.60 and 68,526.40 is: 102,789.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,014.40 : 181,521.60 = 68,526.40 : x
  2. Step 2: Convert to fraction form
    121,014.40/181,521.60 = 68,526.40/x
  3. Step 3: Cross multiply
    121,014.40x = 181,521.60 × 68,526.40
  4. Step 4: Simplify right side
    121,014.40x = 12,439,021,770.24
  5. Step 5: Solve for x
    x = 12,439,021,770.24/121,014.40
  6. Step 6: Final answer
    x = 102,789.60

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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.