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Finding the Fourth Proportional to 172,915.20, 258,854.40 and 162,662.40

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Solution

The fourth proportional to 172,915.20, 258,854.40 and 162,662.40 is: 243,505.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,915.20 : 258,854.40 = 162,662.40 : x
  2. Step 2: Convert to fraction form
    172,915.20/258,854.40 = 162,662.40/x
  3. Step 3: Cross multiply
    172,915.20x = 258,854.40 × 162,662.40
  4. Step 4: Simplify right side
    172,915.20x = 42,105,877,954.56
  5. Step 5: Solve for x
    x = 42,105,877,954.56/172,915.20
  6. Step 6: Final answer
    x = 243,505.94

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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.