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Finding the Fourth Proportional to 122,878.86, 184,362.67 and 42,928.63

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Solution

The fourth proportional to 122,878.86, 184,362.67 and 42,928.63 is: 64,408.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,878.86 : 184,362.67 = 42,928.63 : x
  2. Step 2: Convert to fraction form
    122,878.86/184,362.67 = 42,928.63/x
  3. Step 3: Cross multiply
    122,878.86x = 184,362.67 × 42,928.63
  4. Step 4: Simplify right side
    122,878.86x = 7,914,436,278.01
  5. Step 5: Solve for x
    x = 7,914,436,278.01/122,878.86
  6. Step 6: Final answer
    x = 64,408.45

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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.