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Finding the Fourth Proportional to 216,168.64, 324,030.88 and 83,012.96

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Solution

The fourth proportional to 216,168.64, 324,030.88 and 83,012.96 is: 124,434.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,168.64 : 324,030.88 = 83,012.96 : x
  2. Step 2: Convert to fraction form
    216,168.64/324,030.88 = 83,012.96/x
  3. Step 3: Cross multiply
    216,168.64x = 324,030.88 × 83,012.96
  4. Step 4: Simplify right side
    216,168.64x = 26,898,762,480.20
  5. Step 5: Solve for x
    x = 26,898,762,480.20/216,168.64
  6. Step 6: Final answer
    x = 124,434.16

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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.