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Finding the Fourth Proportional to 66,212.40, 99,232.20 and 30,669.60

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Solution

The fourth proportional to 66,212.40, 99,232.20 and 30,669.60 is: 45,964.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,212.40 : 99,232.20 = 30,669.60 : x
  2. Step 2: Convert to fraction form
    66,212.40/99,232.20 = 30,669.60/x
  3. Step 3: Cross multiply
    66,212.40x = 99,232.20 × 30,669.60
  4. Step 4: Simplify right side
    66,212.40x = 3,043,411,881.12
  5. Step 5: Solve for x
    x = 3,043,411,881.12/66,212.40
  6. Step 6: Final answer
    x = 45,964.38

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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.