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Finding the Fourth Proportional to 100,686.60, 150,900.30 and 61,201.80

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Solution

The fourth proportional to 100,686.60, 150,900.30 and 61,201.80 is: 91,723.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,686.60 : 150,900.30 = 61,201.80 : x
  2. Step 2: Convert to fraction form
    100,686.60/150,900.30 = 61,201.80/x
  3. Step 3: Cross multiply
    100,686.60x = 150,900.30 × 61,201.80
  4. Step 4: Simplify right side
    100,686.60x = 9,235,369,980.54
  5. Step 5: Solve for x
    x = 9,235,369,980.54/100,686.60
  6. Step 6: Final answer
    x = 91,723.92

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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.