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Finding the Fourth Proportional to 91,230.40, 136,844.48 and 28,900.80

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Solution

The fourth proportional to 91,230.40, 136,844.48 and 28,900.80 is: 43,350.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,230.40 : 136,844.48 = 28,900.80 : x
  2. Step 2: Convert to fraction form
    91,230.40/136,844.48 = 28,900.80/x
  3. Step 3: Cross multiply
    91,230.40x = 136,844.48 × 28,900.80
  4. Step 4: Simplify right side
    91,230.40x = 3,954,914,947.58
  5. Step 5: Solve for x
    x = 3,954,914,947.58/91,230.40
  6. Step 6: Final answer
    x = 43,350.85

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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.