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Finding the Fourth Proportional to 87,313.20, 130,710.60 and 57,764.40

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Solution

The fourth proportional to 87,313.20, 130,710.60 and 57,764.40 is: 86,475.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,313.20 : 130,710.60 = 57,764.40 : x
  2. Step 2: Convert to fraction form
    87,313.20/130,710.60 = 57,764.40/x
  3. Step 3: Cross multiply
    87,313.20x = 130,710.60 × 57,764.40
  4. Step 4: Simplify right side
    87,313.20x = 7,550,419,382.64
  5. Step 5: Solve for x
    x = 7,550,419,382.64/87,313.20
  6. Step 6: Final answer
    x = 86,475.12

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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.