Home / 280,485,535.82-420,708,349.58-86,376,710.57

Finding the Fourth Proportional to 280,485,535.82, 420,708,349.58 and 86,376,710.57

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Solution

The fourth proportional to 280,485,535.82, 420,708,349.58 and 86,376,710.57 is: 129,558,920.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,485,535.82 : 420,708,349.58 = 86,376,710.57 : x
  2. Step 2: Convert to fraction form
    280,485,535.82/420,708,349.58 = 86,376,710.57/x
  3. Step 3: Cross multiply
    280,485,535.82x = 420,708,349.58 × 86,376,710.57
  4. Step 4: Simplify right side
    280,485,535.82x = 36,339,403,343,518,616
  5. Step 5: Solve for x
    x = 36,339,403,343,518,616/280,485,535.82
  6. Step 6: Final answer
    x = 129,558,920.88

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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.