Home / 78,279.84-117,406.08-25,682.40

Finding the Fourth Proportional to 78,279.84, 117,406.08 and 25,682.40

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Solution

The fourth proportional to 78,279.84, 117,406.08 and 25,682.40 is: 38,519.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,279.84 : 117,406.08 = 25,682.40 : x
  2. Step 2: Convert to fraction form
    78,279.84/117,406.08 = 25,682.40/x
  3. Step 3: Cross multiply
    78,279.84x = 117,406.08 × 25,682.40
  4. Step 4: Simplify right side
    78,279.84x = 3,015,269,908.99
  5. Step 5: Solve for x
    x = 3,015,269,908.99/78,279.84
  6. Step 6: Final answer
    x = 38,519.11

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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.