Home / 78,472.32-117,671.64-28,517.20

Finding the Fourth Proportional to 78,472.32, 117,671.64 and 28,517.20

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Solution

The fourth proportional to 78,472.32, 117,671.64 and 28,517.20 is: 42,762.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,472.32 : 117,671.64 = 28,517.20 : x
  2. Step 2: Convert to fraction form
    78,472.32/117,671.64 = 28,517.20/x
  3. Step 3: Cross multiply
    78,472.32x = 117,671.64 × 28,517.20
  4. Step 4: Simplify right side
    78,472.32x = 3,355,665,692.21
  5. Step 5: Solve for x
    x = 3,355,665,692.21/78,472.32
  6. Step 6: Final answer
    x = 42,762.41

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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.