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Finding the Fourth Proportional to 103,597.38, 155,380.68 and 28,709.72

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Solution

The fourth proportional to 103,597.38, 155,380.68 and 28,709.72 is: 43,060.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,597.38 : 155,380.68 = 28,709.72 : x
  2. Step 2: Convert to fraction form
    103,597.38/155,380.68 = 28,709.72/x
  3. Step 3: Cross multiply
    103,597.38x = 155,380.68 × 28,709.72
  4. Step 4: Simplify right side
    103,597.38x = 4,460,935,840.49
  5. Step 5: Solve for x
    x = 4,460,935,840.49/103,597.38
  6. Step 6: Final answer
    x = 43,060.31

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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.