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Finding the Fourth Proportional to 231,881.80, 347,822.70 and 74,115.40

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Solution

The fourth proportional to 231,881.80, 347,822.70 and 74,115.40 is: 111,173.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,881.80 : 347,822.70 = 74,115.40 : x
  2. Step 2: Convert to fraction form
    231,881.80/347,822.70 = 74,115.40/x
  3. Step 3: Cross multiply
    231,881.80x = 347,822.70 × 74,115.40
  4. Step 4: Simplify right side
    231,881.80x = 25,779,018,539.58
  5. Step 5: Solve for x
    x = 25,779,018,539.58/231,881.80
  6. Step 6: Final answer
    x = 111,173.10

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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.