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Finding the Fourth Proportional to 143,894.60, 216,036.30 and 91,406.60

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Solution

The fourth proportional to 143,894.60, 216,036.30 and 91,406.60 is: 137,233.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,894.60 : 216,036.30 = 91,406.60 : x
  2. Step 2: Convert to fraction form
    143,894.60/216,036.30 = 91,406.60/x
  3. Step 3: Cross multiply
    143,894.60x = 216,036.30 × 91,406.60
  4. Step 4: Simplify right side
    143,894.60x = 19,747,143,659.58
  5. Step 5: Solve for x
    x = 19,747,143,659.58/143,894.60
  6. Step 6: Final answer
    x = 137,233.39

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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.