Home / 280,485,341.68-420,708,058.82-86,376,516.42

Finding the Fourth Proportional to 280,485,341.68, 420,708,058.82 and 86,376,516.42

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Solution

The fourth proportional to 280,485,341.68, 420,708,058.82 and 86,376,516.42 is: 129,558,629.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,485,341.68 : 420,708,058.82 = 86,376,516.42 : x
  2. Step 2: Convert to fraction form
    280,485,341.68/420,708,058.82 = 86,376,516.42/x
  3. Step 3: Cross multiply
    280,485,341.68x = 420,708,058.82 × 86,376,516.42
  4. Step 4: Simplify right side
    280,485,341.68x = 36,339,296,550,692,056
  5. Step 5: Solve for x
    x = 36,339,296,550,692,056/280,485,341.68
  6. Step 6: Final answer
    x = 129,558,629.81

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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.