Home / 85,102.08-117,509.76-54,902.40

Finding the Fourth Proportional to 85,102.08, 117,509.76 and 54,902.40

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Solution

The fourth proportional to 85,102.08, 117,509.76 and 54,902.40 is: 75,809.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,102.08 : 117,509.76 = 54,902.40 : x
  2. Step 2: Convert to fraction form
    85,102.08/117,509.76 = 54,902.40/x
  3. Step 3: Cross multiply
    85,102.08x = 117,509.76 × 54,902.40
  4. Step 4: Simplify right side
    85,102.08x = 6,451,567,847.42
  5. Step 5: Solve for x
    x = 6,451,567,847.42/85,102.08
  6. Step 6: Final answer
    x = 75,809.76

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1.5x scale

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.