Home / 78,120.08-117,178.88-18,956.24

Finding the Fourth Proportional to 78,120.08, 117,178.88 and 18,956.24

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Solution

The fourth proportional to 78,120.08, 117,178.88 and 18,956.24 is: 28,434.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,120.08 : 117,178.88 = 18,956.24 : x
  2. Step 2: Convert to fraction form
    78,120.08/117,178.88 = 18,956.24/x
  3. Step 3: Cross multiply
    78,120.08x = 117,178.88 × 18,956.24
  4. Step 4: Simplify right side
    78,120.08x = 2,221,270,972.21
  5. Step 5: Solve for x
    x = 2,221,270,972.21/78,120.08
  6. Step 6: Final answer
    x = 28,434.06

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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.