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Finding the Fourth Proportional to 66,300.60, 99,450.90 and 53,178.60

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Solution

The fourth proportional to 66,300.60, 99,450.90 and 53,178.60 is: 79,767.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,300.60 : 99,450.90 = 53,178.60 : x
  2. Step 2: Convert to fraction form
    66,300.60/99,450.90 = 53,178.60/x
  3. Step 3: Cross multiply
    66,300.60x = 99,450.90 × 53,178.60
  4. Step 4: Simplify right side
    66,300.60x = 5,288,659,630.74
  5. Step 5: Solve for x
    x = 5,288,659,630.74/66,300.60
  6. Step 6: Final answer
    x = 79,767.90

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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.