Home / 78,291.13-117,436.37-28,359.54

Finding the Fourth Proportional to 78,291.13, 117,436.37 and 28,359.54

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Solution

The fourth proportional to 78,291.13, 117,436.37 and 28,359.54 is: 42,539.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,291.13 : 117,436.37 = 28,359.54 : x
  2. Step 2: Convert to fraction form
    78,291.13/117,436.37 = 28,359.54/x
  3. Step 3: Cross multiply
    78,291.13x = 117,436.37 × 28,359.54
  4. Step 4: Simplify right side
    78,291.13x = 3,330,440,845.29
  5. Step 5: Solve for x
    x = 3,330,440,845.29/78,291.13
  6. Step 6: Final answer
    x = 42,539.19

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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.