Home / 78,554.40-117,828.72-19,389.60

Finding the Fourth Proportional to 78,554.40, 117,828.72 and 19,389.60

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Solution

The fourth proportional to 78,554.40, 117,828.72 and 19,389.60 is: 29,083.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,554.40 : 117,828.72 = 19,389.60 : x
  2. Step 2: Convert to fraction form
    78,554.40/117,828.72 = 19,389.60/x
  3. Step 3: Cross multiply
    78,554.40x = 117,828.72 × 19,389.60
  4. Step 4: Simplify right side
    78,554.40x = 2,284,651,749.31
  5. Step 5: Solve for x
    x = 2,284,651,749.31/78,554.40
  6. Step 6: Final answer
    x = 29,083.69

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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.