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Finding the Fourth Proportional to 391,136.34, 586,699.56 and 124,893.48

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Solution

The fourth proportional to 391,136.34, 586,699.56 and 124,893.48 is: 187,338.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,136.34 : 586,699.56 = 124,893.48 : x
  2. Step 2: Convert to fraction form
    391,136.34/586,699.56 = 124,893.48/x
  3. Step 3: Cross multiply
    391,136.34x = 586,699.56 × 124,893.48
  4. Step 4: Simplify right side
    391,136.34x = 73,274,949,762.87
  5. Step 5: Solve for x
    x = 73,274,949,762.87/391,136.34
  6. Step 6: Final answer
    x = 187,338.64

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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.