Home / 78,381.36-117,589.08-25,788.24

Finding the Fourth Proportional to 78,381.36, 117,589.08 and 25,788.24

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Solution

The fourth proportional to 78,381.36, 117,589.08 and 25,788.24 is: 38,687.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,381.36 : 117,589.08 = 25,788.24 : x
  2. Step 2: Convert to fraction form
    78,381.36/117,589.08 = 25,788.24/x
  3. Step 3: Cross multiply
    78,381.36x = 117,589.08 × 25,788.24
  4. Step 4: Simplify right side
    78,381.36x = 3,032,415,416.42
  5. Step 5: Solve for x
    x = 3,032,415,416.42/78,381.36
  6. Step 6: Final answer
    x = 38,687.97

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1.5x scale

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.