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Finding the Fourth Proportional to 131,616.80, 197,425.20 and 103,623.20

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Solution

The fourth proportional to 131,616.80, 197,425.20 and 103,623.20 is: 155,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,616.80 : 197,425.20 = 103,623.20 : x
  2. Step 2: Convert to fraction form
    131,616.80/197,425.20 = 103,623.20/x
  3. Step 3: Cross multiply
    131,616.80x = 197,425.20 × 103,623.20
  4. Step 4: Simplify right side
    131,616.80x = 20,457,830,984.64
  5. Step 5: Solve for x
    x = 20,457,830,984.64/131,616.80
  6. Step 6: Final answer
    x = 155,434.80

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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.