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Finding the Fourth Proportional to 66,043.20, 99,064.80 and 38,049.60

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Solution

The fourth proportional to 66,043.20, 99,064.80 and 38,049.60 is: 57,074.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,043.20 : 99,064.80 = 38,049.60 : x
  2. Step 2: Convert to fraction form
    66,043.20/99,064.80 = 38,049.60/x
  3. Step 3: Cross multiply
    66,043.20x = 99,064.80 × 38,049.60
  4. Step 4: Simplify right side
    66,043.20x = 3,769,376,014.08
  5. Step 5: Solve for x
    x = 3,769,376,014.08/66,043.20
  6. Step 6: Final answer
    x = 57,074.40

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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.