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Finding the Fourth Proportional to 79,412.21, 109,580.78 and 47,580.29

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Solution

The fourth proportional to 79,412.21, 109,580.78 and 47,580.29 is: 65,655.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,412.21 : 109,580.78 = 47,580.29 : x
  2. Step 2: Convert to fraction form
    79,412.21/109,580.78 = 47,580.29/x
  3. Step 3: Cross multiply
    79,412.21x = 109,580.78 × 47,580.29
  4. Step 4: Simplify right side
    79,412.21x = 5,213,884,505.02
  5. Step 5: Solve for x
    x = 5,213,884,505.02/79,412.21
  6. Step 6: Final answer
    x = 65,655.96

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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.