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Finding the Fourth Proportional to 143,960.88, 215,941.28 and 77,309.32

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Solution

The fourth proportional to 143,960.88, 215,941.28 and 77,309.32 is: 115,963.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,960.88 : 215,941.28 = 77,309.32 : x
  2. Step 2: Convert to fraction form
    143,960.88/215,941.28 = 77,309.32/x
  3. Step 3: Cross multiply
    143,960.88x = 215,941.28 × 77,309.32
  4. Step 4: Simplify right side
    143,960.88x = 16,694,272,590.33
  5. Step 5: Solve for x
    x = 16,694,272,590.33/143,960.88
  6. Step 6: Final answer
    x = 115,963.96

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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.