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Finding the Fourth Proportional to 231,885.80, 347,828.70 and 113,787.80

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Solution

The fourth proportional to 231,885.80, 347,828.70 and 113,787.80 is: 170,681.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,885.80 : 347,828.70 = 113,787.80 : x
  2. Step 2: Convert to fraction form
    231,885.80/347,828.70 = 113,787.80/x
  3. Step 3: Cross multiply
    231,885.80x = 347,828.70 × 113,787.80
  4. Step 4: Simplify right side
    231,885.80x = 39,578,662,549.86
  5. Step 5: Solve for x
    x = 39,578,662,549.86/231,885.80
  6. Step 6: Final answer
    x = 170,681.70

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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.