Home / 78,318.33-117,395.48-30,915.10

Finding the Fourth Proportional to 78,318.33, 117,395.48 and 30,915.10

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Solution

The fourth proportional to 78,318.33, 117,395.48 and 30,915.10 is: 46,340.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,318.33 : 117,395.48 = 30,915.10 : x
  2. Step 2: Convert to fraction form
    78,318.33/117,395.48 = 30,915.10/x
  3. Step 3: Cross multiply
    78,318.33x = 117,395.48 × 30,915.10
  4. Step 4: Simplify right side
    78,318.33x = 3,629,292,849.17
  5. Step 5: Solve for x
    x = 3,629,292,849.17/78,318.33
  6. Step 6: Final answer
    x = 46,340.28

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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.