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Finding the Fourth Proportional to 66,609.20, 99,913.80 and 37,012.88

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Solution

The fourth proportional to 66,609.20, 99,913.80 and 37,012.88 is: 55,519.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,609.20 : 99,913.80 = 37,012.88 : x
  2. Step 2: Convert to fraction form
    66,609.20/99,913.80 = 37,012.88/x
  3. Step 3: Cross multiply
    66,609.20x = 99,913.80 × 37,012.88
  4. Step 4: Simplify right side
    66,609.20x = 3,698,097,489.74
  5. Step 5: Solve for x
    x = 3,698,097,489.74/66,609.20
  6. Step 6: Final answer
    x = 55,519.32

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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.