Home / 78,461.25-117,683.36-46,443.57

Finding the Fourth Proportional to 78,461.25, 117,683.36 and 46,443.57

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Solution

The fourth proportional to 78,461.25, 117,683.36 and 46,443.57 is: 69,660.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,461.25 : 117,683.36 = 46,443.57 : x
  2. Step 2: Convert to fraction form
    78,461.25/117,683.36 = 46,443.57/x
  3. Step 3: Cross multiply
    78,461.25x = 117,683.36 × 46,443.57
  4. Step 4: Simplify right side
    78,461.25x = 5,465,635,135.78
  5. Step 5: Solve for x
    x = 5,465,635,135.78/78,461.25
  6. Step 6: Final answer
    x = 69,660.31

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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.