Home / 103,431.06-155,143.50-28,555.78

Finding the Fourth Proportional to 103,431.06, 155,143.50 and 28,555.78

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Solution

The fourth proportional to 103,431.06, 155,143.50 and 28,555.78 is: 42,832.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,431.06 : 155,143.50 = 28,555.78 : x
  2. Step 2: Convert to fraction form
    103,431.06/155,143.50 = 28,555.78/x
  3. Step 3: Cross multiply
    103,431.06x = 155,143.50 × 28,555.78
  4. Step 4: Simplify right side
    103,431.06x = 4,430,243,654.43
  5. Step 5: Solve for x
    x = 4,430,243,654.43/103,431.06
  6. Step 6: Final answer
    x = 42,832.82

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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.