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Finding the Fourth Proportional to 87,003.40, 130,505.10 and 84,816.40

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Solution

The fourth proportional to 87,003.40, 130,505.10 and 84,816.40 is: 127,224.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,003.40 : 130,505.10 = 84,816.40 : x
  2. Step 2: Convert to fraction form
    87,003.40/130,505.10 = 84,816.40/x
  3. Step 3: Cross multiply
    87,003.40x = 130,505.10 × 84,816.40
  4. Step 4: Simplify right side
    87,003.40x = 11,068,972,763.64
  5. Step 5: Solve for x
    x = 11,068,972,763.64/87,003.40
  6. Step 6: Final answer
    x = 127,224.60

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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.