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Finding the Fourth Proportional to 391,787.51, 587,635.10 and 107,506.81

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Solution

The fourth proportional to 391,787.51, 587,635.10 and 107,506.81 is: 161,247.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,787.51 : 587,635.10 = 107,506.81 : x
  2. Step 2: Convert to fraction form
    391,787.51/587,635.10 = 107,506.81/x
  3. Step 3: Cross multiply
    391,787.51x = 587,635.10 × 107,506.81
  4. Step 4: Simplify right side
    391,787.51x = 63,174,775,045.03
  5. Step 5: Solve for x
    x = 63,174,775,045.03/391,787.51
  6. Step 6: Final answer
    x = 161,247.55

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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.