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Finding the Fourth Proportional to 144,870.40, 217,305.60 and 81,625.60

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Solution

The fourth proportional to 144,870.40, 217,305.60 and 81,625.60 is: 122,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,870.40 : 217,305.60 = 81,625.60 : x
  2. Step 2: Convert to fraction form
    144,870.40/217,305.60 = 81,625.60/x
  3. Step 3: Cross multiply
    144,870.40x = 217,305.60 × 81,625.60
  4. Step 4: Simplify right side
    144,870.40x = 17,737,699,983.36
  5. Step 5: Solve for x
    x = 17,737,699,983.36/144,870.40
  6. Step 6: Final answer
    x = 122,438.40

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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.