Home / 78,742.08-108,575.79-64,357.27

Finding the Fourth Proportional to 78,742.08, 108,575.79 and 64,357.27

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Solution

The fourth proportional to 78,742.08, 108,575.79 and 64,357.27 is: 88,740.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,742.08 : 108,575.79 = 64,357.27 : x
  2. Step 2: Convert to fraction form
    78,742.08/108,575.79 = 64,357.27/x
  3. Step 3: Cross multiply
    78,742.08x = 108,575.79 × 64,357.27
  4. Step 4: Simplify right side
    78,742.08x = 6,987,640,904.85
  5. Step 5: Solve for x
    x = 6,987,640,904.85/78,742.08
  6. Step 6: Final answer
    x = 88,740.87

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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.