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Finding the Fourth Proportional to 260,644.92, 390,999.59 and 92,130.50

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Solution

The fourth proportional to 260,644.92, 390,999.59 and 92,130.50 is: 138,207.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,644.92 : 390,999.59 = 92,130.50 : x
  2. Step 2: Convert to fraction form
    260,644.92/390,999.59 = 92,130.50/x
  3. Step 3: Cross multiply
    260,644.92x = 390,999.59 × 92,130.50
  4. Step 4: Simplify right side
    260,644.92x = 36,022,985,310.84
  5. Step 5: Solve for x
    x = 36,022,985,310.84/260,644.92
  6. Step 6: Final answer
    x = 138,207.13

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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.