Home / 280,485,530.04-420,708,340.95-86,376,704.79

Finding the Fourth Proportional to 280,485,530.04, 420,708,340.95 and 86,376,704.79

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Solution

The fourth proportional to 280,485,530.04, 420,708,340.95 and 86,376,704.79 is: 129,558,912.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,485,530.04 : 420,708,340.95 = 86,376,704.79 : x
  2. Step 2: Convert to fraction form
    280,485,530.04/420,708,340.95 = 86,376,704.79/x
  3. Step 3: Cross multiply
    280,485,530.04x = 420,708,340.95 × 86,376,704.79
  4. Step 4: Simplify right side
    280,485,530.04x = 36,339,400,168,928,816
  5. Step 5: Solve for x
    x = 36,339,400,168,928,816/280,485,530.04
  6. Step 6: Final answer
    x = 129,558,912.23

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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.