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Finding the Fourth Proportional to 261,799.60, 392,893.80 and 104,141.20

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Solution

The fourth proportional to 261,799.60, 392,893.80 and 104,141.20 is: 156,289.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,799.60 : 392,893.80 = 104,141.20 : x
  2. Step 2: Convert to fraction form
    261,799.60/392,893.80 = 104,141.20/x
  3. Step 3: Cross multiply
    261,799.60x = 392,893.80 × 104,141.20
  4. Step 4: Simplify right side
    261,799.60x = 40,916,431,804.56
  5. Step 5: Solve for x
    x = 40,916,431,804.56/261,799.60
  6. Step 6: Final answer
    x = 156,289.13

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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.