Home / 78,341.10-117,531.09-36,739.50

Finding the Fourth Proportional to 78,341.10, 117,531.09 and 36,739.50

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Solution

The fourth proportional to 78,341.10, 117,531.09 and 36,739.50 is: 55,118.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,341.10 : 117,531.09 = 36,739.50 : x
  2. Step 2: Convert to fraction form
    78,341.10/117,531.09 = 36,739.50/x
  3. Step 3: Cross multiply
    78,341.10x = 117,531.09 × 36,739.50
  4. Step 4: Simplify right side
    78,341.10x = 4,318,033,481.06
  5. Step 5: Solve for x
    x = 4,318,033,481.06/78,341.10
  6. Step 6: Final answer
    x = 55,118.37

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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.