Home / 280,086,216.10-420,191,785.59-86,017,216.66

Finding the Fourth Proportional to 280,086,216.10, 420,191,785.59 and 86,017,216.66

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Solution

The fourth proportional to 280,086,216.10, 420,191,785.59 and 86,017,216.66 is: 129,045,007.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,086,216.10 : 420,191,785.59 = 86,017,216.66 : x
  2. Step 2: Convert to fraction form
    280,086,216.10/420,191,785.59 = 86,017,216.66/x
  3. Step 3: Cross multiply
    280,086,216.10x = 420,191,785.59 × 86,017,216.66
  4. Step 4: Simplify right side
    280,086,216.10x = 36,143,727,859,847,296
  5. Step 5: Solve for x
    x = 36,143,727,859,847,296/280,086,216.10
  6. Step 6: Final answer
    x = 129,045,007.51

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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.