Home / 78,215.08-117,357.50-36,072.50

Finding the Fourth Proportional to 78,215.08, 117,357.50 and 36,072.50

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Solution

The fourth proportional to 78,215.08, 117,357.50 and 36,072.50 is: 54,124.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,215.08 : 117,357.50 = 36,072.50 : x
  2. Step 2: Convert to fraction form
    78,215.08/117,357.50 = 36,072.50/x
  3. Step 3: Cross multiply
    78,215.08x = 117,357.50 × 36,072.50
  4. Step 4: Simplify right side
    78,215.08x = 4,233,378,418.75
  5. Step 5: Solve for x
    x = 4,233,378,418.75/78,215.08
  6. Step 6: Final answer
    x = 54,124.84

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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.