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Finding the Fourth Proportional to 101,956.71, 140,722.77 and 56,650.28

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Solution

The fourth proportional to 101,956.71, 140,722.77 and 56,650.28 is: 78,189.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,956.71 : 140,722.77 = 56,650.28 : x
  2. Step 2: Convert to fraction form
    101,956.71/140,722.77 = 56,650.28/x
  3. Step 3: Cross multiply
    101,956.71x = 140,722.77 × 56,650.28
  4. Step 4: Simplify right side
    101,956.71x = 7,971,983,619.26
  5. Step 5: Solve for x
    x = 7,971,983,619.26/101,956.71
  6. Step 6: Final answer
    x = 78,189.89

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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.