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Finding the Fourth Proportional to 143,791.60, 215,687.40 and 38,621.20

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Solution

The fourth proportional to 143,791.60, 215,687.40 and 38,621.20 is: 57,931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,791.60 : 215,687.40 = 38,621.20 : x
  2. Step 2: Convert to fraction form
    143,791.60/215,687.40 = 38,621.20/x
  3. Step 3: Cross multiply
    143,791.60x = 215,687.40 × 38,621.20
  4. Step 4: Simplify right side
    143,791.60x = 8,330,106,212.88
  5. Step 5: Solve for x
    x = 8,330,106,212.88/143,791.60
  6. Step 6: Final answer
    x = 57,931.80

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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.