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Finding the Fourth Proportional to 101,713.51, 140,379.18 and 56,401.57

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Solution

The fourth proportional to 101,713.51, 140,379.18 and 56,401.57 is: 77,842.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,713.51 : 140,379.18 = 56,401.57 : x
  2. Step 2: Convert to fraction form
    101,713.51/140,379.18 = 56,401.57/x
  3. Step 3: Cross multiply
    101,713.51x = 140,379.18 × 56,401.57
  4. Step 4: Simplify right side
    101,713.51x = 7,917,605,865.30
  5. Step 5: Solve for x
    x = 7,917,605,865.30/101,713.51
  6. Step 6: Final answer
    x = 77,842.22

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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.