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Finding the Fourth Proportional to 79,047.36, 109,074.60 and 47,209.50

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Solution

The fourth proportional to 79,047.36, 109,074.60 and 47,209.50 is: 65,142.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,047.36 : 109,074.60 = 47,209.50 : x
  2. Step 2: Convert to fraction form
    79,047.36/109,074.60 = 47,209.50/x
  3. Step 3: Cross multiply
    79,047.36x = 109,074.60 × 47,209.50
  4. Step 4: Simplify right side
    79,047.36x = 5,149,357,328.70
  5. Step 5: Solve for x
    x = 5,149,357,328.70/79,047.36
  6. Step 6: Final answer
    x = 65,142.69

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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.