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Finding the Fourth Proportional to 131,931.20, 197,896.80 and 53,004.80

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Solution

The fourth proportional to 131,931.20, 197,896.80 and 53,004.80 is: 79,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,931.20 : 197,896.80 = 53,004.80 : x
  2. Step 2: Convert to fraction form
    131,931.20/197,896.80 = 53,004.80/x
  3. Step 3: Cross multiply
    131,931.20x = 197,896.80 × 53,004.80
  4. Step 4: Simplify right side
    131,931.20x = 10,489,480,304.64
  5. Step 5: Solve for x
    x = 10,489,480,304.64/131,931.20
  6. Step 6: Final answer
    x = 79,507.20

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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.