Home / 78,653.42-117,954.16-31,280.26

Finding the Fourth Proportional to 78,653.42, 117,954.16 and 31,280.26

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Solution

The fourth proportional to 78,653.42, 117,954.16 and 31,280.26 is: 46,910.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,653.42 : 117,954.16 = 31,280.26 : x
  2. Step 2: Convert to fraction form
    78,653.42/117,954.16 = 31,280.26/x
  3. Step 3: Cross multiply
    78,653.42x = 117,954.16 × 31,280.26
  4. Step 4: Simplify right side
    78,653.42x = 3,689,636,792.88
  5. Step 5: Solve for x
    x = 3,689,636,792.88/78,653.42
  6. Step 6: Final answer
    x = 46,910.06

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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.