Home / 290,665,689.60-436,082,690.72-86,198,685.60

Finding the Fourth Proportional to 290,665,689.60, 436,082,690.72 and 86,198,685.60

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Solution

The fourth proportional to 290,665,689.60, 436,082,690.72 and 86,198,685.60 is: 129,322,985.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,665,689.60 : 436,082,690.72 = 86,198,685.60 : x
  2. Step 2: Convert to fraction form
    290,665,689.60/436,082,690.72 = 86,198,685.60/x
  3. Step 3: Cross multiply
    290,665,689.60x = 436,082,690.72 × 86,198,685.60
  4. Step 4: Simplify right side
    290,665,689.60x = 37,589,754,752,975,320
  5. Step 5: Solve for x
    x = 37,589,754,752,975,320/290,665,689.60
  6. Step 6: Final answer
    x = 129,322,985.47

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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.