Home / 81,734.15-122,597.87-28,438.32

Finding the Fourth Proportional to 81,734.15, 122,597.87 and 28,438.32

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Solution

The fourth proportional to 81,734.15, 122,597.87 and 28,438.32 is: 42,656.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,734.15 : 122,597.87 = 28,438.32 : x
  2. Step 2: Convert to fraction form
    81,734.15/122,597.87 = 28,438.32/x
  3. Step 3: Cross multiply
    81,734.15x = 122,597.87 × 28,438.32
  4. Step 4: Simplify right side
    81,734.15x = 3,486,477,935.89
  5. Step 5: Solve for x
    x = 3,486,477,935.89/81,734.15
  6. Step 6: Final answer
    x = 42,656.32

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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.