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Finding the Fourth Proportional to 216,007.20, 323,969.04 and 66,211.20

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Solution

The fourth proportional to 216,007.20, 323,969.04 and 66,211.20 is: 99,304.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,007.20 : 323,969.04 = 66,211.20 : x
  2. Step 2: Convert to fraction form
    216,007.20/323,969.04 = 66,211.20/x
  3. Step 3: Cross multiply
    216,007.20x = 323,969.04 × 66,211.20
  4. Step 4: Simplify right side
    216,007.20x = 21,450,378,901.25
  5. Step 5: Solve for x
    x = 21,450,378,901.25/216,007.20
  6. Step 6: Final answer
    x = 99,304.00

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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.