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Finding the Fourth Proportional to 90,990.80, 125,562.12 and 50,146.82

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Solution

The fourth proportional to 90,990.80, 125,562.12 and 50,146.82 is: 69,199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,990.80 : 125,562.12 = 50,146.82 : x
  2. Step 2: Convert to fraction form
    90,990.80/125,562.12 = 50,146.82/x
  3. Step 3: Cross multiply
    90,990.80x = 125,562.12 × 50,146.82
  4. Step 4: Simplify right side
    90,990.80x = 6,296,541,030.46
  5. Step 5: Solve for x
    x = 6,296,541,030.46/90,990.80
  6. Step 6: Final answer
    x = 69,199.75

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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.