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Finding the Fourth Proportional to 143,881.60, 215,822.40 and 80,636.80

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Solution

The fourth proportional to 143,881.60, 215,822.40 and 80,636.80 is: 120,955.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,881.60 : 215,822.40 = 80,636.80 : x
  2. Step 2: Convert to fraction form
    143,881.60/215,822.40 = 80,636.80/x
  3. Step 3: Cross multiply
    143,881.60x = 215,822.40 × 80,636.80
  4. Step 4: Simplify right side
    143,881.60x = 17,403,227,704.32
  5. Step 5: Solve for x
    x = 17,403,227,704.32/143,881.60
  6. Step 6: Final answer
    x = 120,955.20

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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.