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Finding the Fourth Proportional to 100,621.20, 150,931.80 and 53,965.20

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Solution

The fourth proportional to 100,621.20, 150,931.80 and 53,965.20 is: 80,947.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,621.20 : 150,931.80 = 53,965.20 : x
  2. Step 2: Convert to fraction form
    100,621.20/150,931.80 = 53,965.20/x
  3. Step 3: Cross multiply
    100,621.20x = 150,931.80 × 53,965.20
  4. Step 4: Simplify right side
    100,621.20x = 8,145,064,773.36
  5. Step 5: Solve for x
    x = 8,145,064,773.36/100,621.20
  6. Step 6: Final answer
    x = 80,947.80

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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.