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Finding the Fourth Proportional to 57,918.70, 87,063.65 and 53,809.90

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Solution

The fourth proportional to 57,918.70, 87,063.65 and 53,809.90 is: 80,887.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,918.70 : 87,063.65 = 53,809.90 : x
  2. Step 2: Convert to fraction form
    57,918.70/87,063.65 = 53,809.90/x
  3. Step 3: Cross multiply
    57,918.70x = 87,063.65 × 53,809.90
  4. Step 4: Simplify right side
    57,918.70x = 4,684,886,300.14
  5. Step 5: Solve for x
    x = 4,684,886,300.14/57,918.70
  6. Step 6: Final answer
    x = 80,887.28

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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.