Home / 78,540.03-117,809.64-31,792.50

Finding the Fourth Proportional to 78,540.03, 117,809.64 and 31,792.50

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Solution

The fourth proportional to 78,540.03, 117,809.64 and 31,792.50 is: 47,688.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,540.03 : 117,809.64 = 31,792.50 : x
  2. Step 2: Convert to fraction form
    78,540.03/117,809.64 = 31,792.50/x
  3. Step 3: Cross multiply
    78,540.03x = 117,809.64 × 31,792.50
  4. Step 4: Simplify right side
    78,540.03x = 3,745,462,979.70
  5. Step 5: Solve for x
    x = 3,745,462,979.70/78,540.03
  6. Step 6: Final answer
    x = 47,688.59

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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.