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Finding the Fourth Proportional to 81,106.08, 121,568.28 and 53,080.08

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Solution

The fourth proportional to 81,106.08, 121,568.28 and 53,080.08 is: 79,560.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,106.08 : 121,568.28 = 53,080.08 : x
  2. Step 2: Convert to fraction form
    81,106.08/121,568.28 = 53,080.08/x
  3. Step 3: Cross multiply
    81,106.08x = 121,568.28 × 53,080.08
  4. Step 4: Simplify right side
    81,106.08x = 6,452,854,027.86
  5. Step 5: Solve for x
    x = 6,452,854,027.86/81,106.08
  6. Step 6: Final answer
    x = 79,560.67

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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.