Home / 78,427.78-117,589.66-28,501.94

Finding the Fourth Proportional to 78,427.78, 117,589.66 and 28,501.94

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Solution

The fourth proportional to 78,427.78, 117,589.66 and 28,501.94 is: 42,734.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,427.78 : 117,589.66 = 28,501.94 : x
  2. Step 2: Convert to fraction form
    78,427.78/117,589.66 = 28,501.94/x
  3. Step 3: Cross multiply
    78,427.78x = 117,589.66 × 28,501.94
  4. Step 4: Simplify right side
    78,427.78x = 3,351,533,656.66
  5. Step 5: Solve for x
    x = 3,351,533,656.66/78,427.78
  6. Step 6: Final answer
    x = 42,734.01

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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.