Home / 65,729.78-90,515.94-57,111.92

Finding the Fourth Proportional to 65,729.78, 90,515.94 and 57,111.92

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Solution

The fourth proportional to 65,729.78, 90,515.94 and 57,111.92 is: 78,648.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,729.78 : 90,515.94 = 57,111.92 : x
  2. Step 2: Convert to fraction form
    65,729.78/90,515.94 = 57,111.92/x
  3. Step 3: Cross multiply
    65,729.78x = 90,515.94 × 57,111.92
  4. Step 4: Simplify right side
    65,729.78x = 5,169,539,124.00
  5. Step 5: Solve for x
    x = 5,169,539,124.00/65,729.78
  6. Step 6: Final answer
    x = 78,648.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.