Home / 280,666,391.43-420,702,704.17-105,713,728.96

Finding the Fourth Proportional to 280,666,391.43, 420,702,704.17 and 105,713,728.96

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Solution

The fourth proportional to 280,666,391.43, 420,702,704.17 and 105,713,728.96 is: 158,458,771.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,666,391.43 : 420,702,704.17 = 105,713,728.96 : x
  2. Step 2: Convert to fraction form
    280,666,391.43/420,702,704.17 = 105,713,728.96/x
  3. Step 3: Cross multiply
    280,666,391.43x = 420,702,704.17 × 105,713,728.96
  4. Step 4: Simplify right side
    280,666,391.43x = 44,474,051,641,366,440
  5. Step 5: Solve for x
    x = 44,474,051,641,366,440/280,666,391.43
  6. Step 6: Final answer
    x = 158,458,771.69

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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.