Home / 78,202.16-117,215.12-38,787.52

Finding the Fourth Proportional to 78,202.16, 117,215.12 and 38,787.52

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Solution

The fourth proportional to 78,202.16, 117,215.12 and 38,787.52 is: 58,137.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,202.16 : 117,215.12 = 38,787.52 : x
  2. Step 2: Convert to fraction form
    78,202.16/117,215.12 = 38,787.52/x
  3. Step 3: Cross multiply
    78,202.16x = 117,215.12 × 38,787.52
  4. Step 4: Simplify right side
    78,202.16x = 4,546,483,811.30
  5. Step 5: Solve for x
    x = 4,546,483,811.30/78,202.16
  6. Step 6: Final answer
    x = 58,137.57

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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.