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Finding the Fourth Proportional to 66,069.60, 99,131.76 and 36,484.80

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Solution

The fourth proportional to 66,069.60, 99,131.76 and 36,484.80 is: 54,742.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,069.60 : 99,131.76 = 36,484.80 : x
  2. Step 2: Convert to fraction form
    66,069.60/99,131.76 = 36,484.80/x
  3. Step 3: Cross multiply
    66,069.60x = 99,131.76 × 36,484.80
  4. Step 4: Simplify right side
    66,069.60x = 3,616,802,437.25
  5. Step 5: Solve for x
    x = 3,616,802,437.25/66,069.60
  6. Step 6: Final answer
    x = 54,742.31

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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.