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Finding the Fourth Proportional to 258,291.60, 387,375.72 and 108,534.72

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Solution

The fourth proportional to 258,291.60, 387,375.72 and 108,534.72 is: 162,776.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,291.60 : 387,375.72 = 108,534.72 : x
  2. Step 2: Convert to fraction form
    258,291.60/387,375.72 = 108,534.72/x
  3. Step 3: Cross multiply
    258,291.60x = 387,375.72 × 108,534.72
  4. Step 4: Simplify right side
    258,291.60x = 42,043,715,305.00
  5. Step 5: Solve for x
    x = 42,043,715,305.00/258,291.60
  6. Step 6: Final answer
    x = 162,776.16

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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.