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Finding the Fourth Proportional to 87,365.76, 131,035.84 and 42,980.64

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Solution

The fourth proportional to 87,365.76, 131,035.84 and 42,980.64 is: 64,464.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,365.76 : 131,035.84 = 42,980.64 : x
  2. Step 2: Convert to fraction form
    87,365.76/131,035.84 = 42,980.64/x
  3. Step 3: Cross multiply
    87,365.76x = 131,035.84 × 42,980.64
  4. Step 4: Simplify right side
    87,365.76x = 5,632,004,266.14
  5. Step 5: Solve for x
    x = 5,632,004,266.14/87,365.76
  6. Step 6: Final answer
    x = 64,464.66

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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.