Home / 103,981.68-155,858.31-40,782.78

Finding the Fourth Proportional to 103,981.68, 155,858.31 and 40,782.78

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Solution

The fourth proportional to 103,981.68, 155,858.31 and 40,782.78 is: 61,129.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,981.68 : 155,858.31 = 40,782.78 : x
  2. Step 2: Convert to fraction form
    103,981.68/155,858.31 = 40,782.78/x
  3. Step 3: Cross multiply
    103,981.68x = 155,858.31 × 40,782.78
  4. Step 4: Simplify right side
    103,981.68x = 6,356,335,167.90
  5. Step 5: Solve for x
    x = 6,356,335,167.90/103,981.68
  6. Step 6: Final answer
    x = 61,129.38

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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.