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Finding the Fourth Proportional to 78,861.92, 108,803.40 and 52,017.80

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Solution

The fourth proportional to 78,861.92, 108,803.40 and 52,017.80 is: 71,767.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,861.92 : 108,803.40 = 52,017.80 : x
  2. Step 2: Convert to fraction form
    78,861.92/108,803.40 = 52,017.80/x
  3. Step 3: Cross multiply
    78,861.92x = 108,803.40 × 52,017.80
  4. Step 4: Simplify right side
    78,861.92x = 5,659,713,500.52
  5. Step 5: Solve for x
    x = 5,659,713,500.52/78,861.92
  6. Step 6: Final answer
    x = 71,767.38

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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.