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Finding the Fourth Proportional to 128,023.56, 191,994.00 and 42,611.64

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Solution

The fourth proportional to 128,023.56, 191,994.00 and 42,611.64 is: 63,903.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,023.56 : 191,994.00 = 42,611.64 : x
  2. Step 2: Convert to fraction form
    128,023.56/191,994.00 = 42,611.64/x
  3. Step 3: Cross multiply
    128,023.56x = 191,994.00 × 42,611.64
  4. Step 4: Simplify right side
    128,023.56x = 8,181,179,950.34
  5. Step 5: Solve for x
    x = 8,181,179,950.34/128,023.56
  6. Step 6: Final answer
    x = 63,903.70

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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.