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Finding the Fourth Proportional to 258,459.60, 387,702.20 and 134,043.60

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Solution

The fourth proportional to 258,459.60, 387,702.20 and 134,043.60 is: 201,072.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,459.60 : 387,702.20 = 134,043.60 : x
  2. Step 2: Convert to fraction form
    258,459.60/387,702.20 = 134,043.60/x
  3. Step 3: Cross multiply
    258,459.60x = 387,702.20 × 134,043.60
  4. Step 4: Simplify right side
    258,459.60x = 51,968,998,615.92
  5. Step 5: Solve for x
    x = 51,968,998,615.92/258,459.60
  6. Step 6: Final answer
    x = 201,072.04

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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.