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Finding the Fourth Proportional to 172,436.80, 258,655.20 and 144,880.60

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Solution

The fourth proportional to 172,436.80, 258,655.20 and 144,880.60 is: 217,320.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,436.80 : 258,655.20 = 144,880.60 : x
  2. Step 2: Convert to fraction form
    172,436.80/258,655.20 = 144,880.60/x
  3. Step 3: Cross multiply
    172,436.80x = 258,655.20 × 144,880.60
  4. Step 4: Simplify right side
    172,436.80x = 37,474,120,569.12
  5. Step 5: Solve for x
    x = 37,474,120,569.12/172,436.80
  6. Step 6: Final answer
    x = 217,320.90

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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.