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Finding the Fourth Proportional to 121,074, 181,611.90 and 42,188.10

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Solution

The fourth proportional to 121,074, 181,611.90 and 42,188.10 is: 63,282.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,074 : 181,611.90 = 42,188.10 : x
  2. Step 2: Convert to fraction form
    121,074/181,611.90 = 42,188.10/x
  3. Step 3: Cross multiply
    121,074x = 181,611.90 × 42,188.10
  4. Step 4: Simplify right side
    121,074x = 7,661,860,998.39
  5. Step 5: Solve for x
    x = 7,661,860,998.39/121,074
  6. Step 6: Final answer
    x = 63,282.46

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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.