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Finding the Fourth Proportional to 92,959.80, 139,439.70 and 86,544.60

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Solution

The fourth proportional to 92,959.80, 139,439.70 and 86,544.60 is: 129,816.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,959.80 : 139,439.70 = 86,544.60 : x
  2. Step 2: Convert to fraction form
    92,959.80/139,439.70 = 86,544.60/x
  3. Step 3: Cross multiply
    92,959.80x = 139,439.70 × 86,544.60
  4. Step 4: Simplify right side
    92,959.80x = 12,067,753,060.62
  5. Step 5: Solve for x
    x = 12,067,753,060.62/92,959.80
  6. Step 6: Final answer
    x = 129,816.90

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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.