Home / 103,218.03-142,388.42-67,428.99

Finding the Fourth Proportional to 103,218.03, 142,388.42 and 67,428.99

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Solution

The fourth proportional to 103,218.03, 142,388.42 and 67,428.99 is: 93,017.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,218.03 : 142,388.42 = 67,428.99 : x
  2. Step 2: Convert to fraction form
    103,218.03/142,388.42 = 67,428.99/x
  3. Step 3: Cross multiply
    103,218.03x = 142,388.42 × 67,428.99
  4. Step 4: Simplify right side
    103,218.03x = 9,601,107,011.15
  5. Step 5: Solve for x
    x = 9,601,107,011.15/103,218.03
  6. Step 6: Final answer
    x = 93,017.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.