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Finding the Fourth Proportional to 133,995.60, 200,701.80 and 81,313.20

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Solution

The fourth proportional to 133,995.60, 200,701.80 and 81,313.20 is: 121,792.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,995.60 : 200,701.80 = 81,313.20 : x
  2. Step 2: Convert to fraction form
    133,995.60/200,701.80 = 81,313.20/x
  3. Step 3: Cross multiply
    133,995.60x = 200,701.80 × 81,313.20
  4. Step 4: Simplify right side
    133,995.60x = 16,319,705,603.76
  5. Step 5: Solve for x
    x = 16,319,705,603.76/133,995.60
  6. Step 6: Final answer
    x = 121,792.85

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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.