Home / 78,539.34-117,858.23-31,792.22

Finding the Fourth Proportional to 78,539.34, 117,858.23 and 31,792.22

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Solution

The fourth proportional to 78,539.34, 117,858.23 and 31,792.22 is: 47,708.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,539.34 : 117,858.23 = 31,792.22 : x
  2. Step 2: Convert to fraction form
    78,539.34/117,858.23 = 31,792.22/x
  3. Step 3: Cross multiply
    78,539.34x = 117,858.23 × 31,792.22
  4. Step 4: Simplify right side
    78,539.34x = 3,746,974,589.91
  5. Step 5: Solve for x
    x = 3,746,974,589.91/78,539.34
  6. Step 6: Final answer
    x = 47,708.25

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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.