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Finding the Fourth Proportional to 79,308.75, 109,455.80 and 45,774.75

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Solution

The fourth proportional to 79,308.75, 109,455.80 and 45,774.75 is: 63,174.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,308.75 : 109,455.80 = 45,774.75 : x
  2. Step 2: Convert to fraction form
    79,308.75/109,455.80 = 45,774.75/x
  3. Step 3: Cross multiply
    79,308.75x = 109,455.80 × 45,774.75
  4. Step 4: Simplify right side
    79,308.75x = 5,010,311,881.05
  5. Step 5: Solve for x
    x = 5,010,311,881.05/79,308.75
  6. Step 6: Final answer
    x = 63,174.77

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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.