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Finding the Fourth Proportional to 257,381.37, 386,123.67 and 88,907.85

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Solution

The fourth proportional to 257,381.37, 386,123.67 and 88,907.85 is: 133,379.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,381.37 : 386,123.67 = 88,907.85 : x
  2. Step 2: Convert to fraction form
    257,381.37/386,123.67 = 88,907.85/x
  3. Step 3: Cross multiply
    257,381.37x = 386,123.67 × 88,907.85
  4. Step 4: Simplify right side
    257,381.37x = 34,329,425,333.81
  5. Step 5: Solve for x
    x = 34,329,425,333.81/257,381.37
  6. Step 6: Final answer
    x = 133,379.60

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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.