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Finding the Fourth Proportional to 90,668.64, 125,083.92 and 56,618.01

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Solution

The fourth proportional to 90,668.64, 125,083.92 and 56,618.01 is: 78,108.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,668.64 : 125,083.92 = 56,618.01 : x
  2. Step 2: Convert to fraction form
    90,668.64/125,083.92 = 56,618.01/x
  3. Step 3: Cross multiply
    90,668.64x = 125,083.92 × 56,618.01
  4. Step 4: Simplify right side
    90,668.64x = 7,082,002,350.31
  5. Step 5: Solve for x
    x = 7,082,002,350.31/90,668.64
  6. Step 6: Final answer
    x = 78,108.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.