Home / 78,382.32-117,548.40-25,779.36

Finding the Fourth Proportional to 78,382.32, 117,548.40 and 25,779.36

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Solution

The fourth proportional to 78,382.32, 117,548.40 and 25,779.36 is: 38,660.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,382.32 : 117,548.40 = 25,779.36 : x
  2. Step 2: Convert to fraction form
    78,382.32/117,548.40 = 25,779.36/x
  3. Step 3: Cross multiply
    78,382.32x = 117,548.40 × 25,779.36
  4. Step 4: Simplify right side
    78,382.32x = 3,030,322,521.02
  5. Step 5: Solve for x
    x = 3,030,322,521.02/78,382.32
  6. Step 6: Final answer
    x = 38,660.79

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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.