Home / 78,468.32-117,665.62-28,513.19

Finding the Fourth Proportional to 78,468.32, 117,665.62 and 28,513.19

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Solution

The fourth proportional to 78,468.32, 117,665.62 and 28,513.19 is: 42,756.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,468.32 : 117,665.62 = 28,513.19 : x
  2. Step 2: Convert to fraction form
    78,468.32/117,665.62 = 28,513.19/x
  3. Step 3: Cross multiply
    78,468.32x = 117,665.62 × 28,513.19
  4. Step 4: Simplify right side
    78,468.32x = 3,355,022,179.53
  5. Step 5: Solve for x
    x = 3,355,022,179.53/78,468.32
  6. Step 6: Final answer
    x = 42,756.39

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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.