Home / 290,790.42-436,185.78-91,126.43

Finding the Fourth Proportional to 290,790.42, 436,185.78 and 91,126.43

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Solution

The fourth proportional to 290,790.42, 436,185.78 and 91,126.43 is: 136,689.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,790.42 : 436,185.78 = 91,126.43 : x
  2. Step 2: Convert to fraction form
    290,790.42/436,185.78 = 91,126.43/x
  3. Step 3: Cross multiply
    290,790.42x = 436,185.78 × 91,126.43
  4. Step 4: Simplify right side
    290,790.42x = 39,748,052,948.17
  5. Step 5: Solve for x
    x = 39,748,052,948.17/290,790.42
  6. Step 6: Final answer
    x = 136,689.69

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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.