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Finding the Fourth Proportional to 78,812.76, 108,777.80 and 48,191.09

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Solution

The fourth proportional to 78,812.76, 108,777.80 and 48,191.09 is: 66,513.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,812.76 : 108,777.80 = 48,191.09 : x
  2. Step 2: Convert to fraction form
    78,812.76/108,777.80 = 48,191.09/x
  3. Step 3: Cross multiply
    78,812.76x = 108,777.80 × 48,191.09
  4. Step 4: Simplify right side
    78,812.76x = 5,242,120,508.85
  5. Step 5: Solve for x
    x = 5,242,120,508.85/78,812.76
  6. Step 6: Final answer
    x = 66,513.60

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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.