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Finding the Fourth Proportional to 79,290.86, 109,430.08 and 50,636.92

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Solution

The fourth proportional to 79,290.86, 109,430.08 and 50,636.92 is: 69,884.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,290.86 : 109,430.08 = 50,636.92 : x
  2. Step 2: Convert to fraction form
    79,290.86/109,430.08 = 50,636.92/x
  3. Step 3: Cross multiply
    79,290.86x = 109,430.08 × 50,636.92
  4. Step 4: Simplify right side
    79,290.86x = 5,541,202,206.55
  5. Step 5: Solve for x
    x = 5,541,202,206.55/79,290.86
  6. Step 6: Final answer
    x = 69,884.50

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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.