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Finding the Fourth Proportional to 143,945.60, 215,950.80 and 84,750.80

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Solution

The fourth proportional to 143,945.60, 215,950.80 and 84,750.80 is: 127,145.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,945.60 : 215,950.80 = 84,750.80 : x
  2. Step 2: Convert to fraction form
    143,945.60/215,950.80 = 84,750.80/x
  3. Step 3: Cross multiply
    143,945.60x = 215,950.80 × 84,750.80
  4. Step 4: Simplify right side
    143,945.60x = 18,302,003,060.64
  5. Step 5: Solve for x
    x = 18,302,003,060.64/143,945.60
  6. Step 6: Final answer
    x = 127,145.28

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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.