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Finding the Fourth Proportional to 66,216.80, 99,324.32 and 31,131.64

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Solution

The fourth proportional to 66,216.80, 99,324.32 and 31,131.64 is: 46,697.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,216.80 : 99,324.32 = 31,131.64 : x
  2. Step 2: Convert to fraction form
    66,216.80/99,324.32 = 31,131.64/x
  3. Step 3: Cross multiply
    66,216.80x = 99,324.32 × 31,131.64
  4. Step 4: Simplify right side
    66,216.80x = 3,092,128,973.48
  5. Step 5: Solve for x
    x = 3,092,128,973.48/66,216.80
  6. Step 6: Final answer
    x = 46,697.05

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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.