Home / 78,108.32-117,138.26-28,181.94

Finding the Fourth Proportional to 78,108.32, 117,138.26 and 28,181.94

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Solution

The fourth proportional to 78,108.32, 117,138.26 and 28,181.94 is: 42,264.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,108.32 : 117,138.26 = 28,181.94 : x
  2. Step 2: Convert to fraction form
    78,108.32/117,138.26 = 28,181.94/x
  3. Step 3: Cross multiply
    78,108.32x = 117,138.26 × 28,181.94
  4. Step 4: Simplify right side
    78,108.32x = 3,301,183,415.02
  5. Step 5: Solve for x
    x = 3,301,183,415.02/78,108.32
  6. Step 6: Final answer
    x = 42,264.17

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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.