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Finding the Fourth Proportional to 103,570.82, 155,359.67 and 28,691.72

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Solution

The fourth proportional to 103,570.82, 155,359.67 and 28,691.72 is: 43,038.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,570.82 : 155,359.67 = 28,691.72 : x
  2. Step 2: Convert to fraction form
    103,570.82/155,359.67 = 28,691.72/x
  3. Step 3: Cross multiply
    103,570.82x = 155,359.67 × 28,691.72
  4. Step 4: Simplify right side
    103,570.82x = 4,457,535,230.68
  5. Step 5: Solve for x
    x = 4,457,535,230.68/103,570.82
  6. Step 6: Final answer
    x = 43,038.53

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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.