Home / 78,292.32-117,438.08-19,128.32

Finding the Fourth Proportional to 78,292.32, 117,438.08 and 19,128.32

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Solution

The fourth proportional to 78,292.32, 117,438.08 and 19,128.32 is: 28,692.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,292.32 : 117,438.08 = 19,128.32 : x
  2. Step 2: Convert to fraction form
    78,292.32/117,438.08 = 19,128.32/x
  3. Step 3: Cross multiply
    78,292.32x = 117,438.08 × 19,128.32
  4. Step 4: Simplify right side
    78,292.32x = 2,246,393,174.43
  5. Step 5: Solve for x
    x = 2,246,393,174.43/78,292.32
  6. Step 6: Final answer
    x = 28,692.38

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1.5x scale

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.