Home / 78,449.45-117,637.21-28,494.32

Finding the Fourth Proportional to 78,449.45, 117,637.21 and 28,494.32

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Solution

The fourth proportional to 78,449.45, 117,637.21 and 28,494.32 is: 42,728.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,449.45 : 117,637.21 = 28,494.32 : x
  2. Step 2: Convert to fraction form
    78,449.45/117,637.21 = 28,494.32/x
  3. Step 3: Cross multiply
    78,449.45x = 117,637.21 × 28,494.32
  4. Step 4: Simplify right side
    78,449.45x = 3,351,991,646.23
  5. Step 5: Solve for x
    x = 3,351,991,646.23/78,449.45
  6. Step 6: Final answer
    x = 42,728.05

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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.