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Finding the Fourth Proportional to 80,791.55, 121,080.40 and 61,999.77

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Solution

The fourth proportional to 80,791.55, 121,080.40 and 61,999.77 is: 92,917.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,791.55 : 121,080.40 = 61,999.77 : x
  2. Step 2: Convert to fraction form
    80,791.55/121,080.40 = 61,999.77/x
  3. Step 3: Cross multiply
    80,791.55x = 121,080.40 × 61,999.77
  4. Step 4: Simplify right side
    80,791.55x = 7,506,956,951.51
  5. Step 5: Solve for x
    x = 7,506,956,951.51/80,791.55
  6. Step 6: Final answer
    x = 92,917.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.