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Finding the Fourth Proportional to 172,385.20, 258,577.80 and 113,287.60

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Solution

The fourth proportional to 172,385.20, 258,577.80 and 113,287.60 is: 169,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,385.20 : 258,577.80 = 113,287.60 : x
  2. Step 2: Convert to fraction form
    172,385.20/258,577.80 = 113,287.60/x
  3. Step 3: Cross multiply
    172,385.20x = 258,577.80 × 113,287.60
  4. Step 4: Simplify right side
    172,385.20x = 29,293,658,375.28
  5. Step 5: Solve for x
    x = 29,293,658,375.28/172,385.20
  6. Step 6: Final answer
    x = 169,931.40

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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.