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Finding the Fourth Proportional to 87,749.64, 121,051.64 and 57,521.64

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Solution

The fourth proportional to 87,749.64, 121,051.64 and 57,521.64 is: 79,351.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,749.64 : 121,051.64 = 57,521.64 : x
  2. Step 2: Convert to fraction form
    87,749.64/121,051.64 = 57,521.64/x
  3. Step 3: Cross multiply
    87,749.64x = 121,051.64 × 57,521.64
  4. Step 4: Simplify right side
    87,749.64x = 6,963,088,857.49
  5. Step 5: Solve for x
    x = 6,963,088,857.49/87,749.64
  6. Step 6: Final answer
    x = 79,351.77

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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.