Home / 280,295,390.80-420,368,436.60-86,206,430.80

Finding the Fourth Proportional to 280,295,390.80, 420,368,436.60 and 86,206,430.80

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Solution

The fourth proportional to 280,295,390.80, 420,368,436.60 and 86,206,430.80 is: 129,286,687.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,295,390.80 : 420,368,436.60 = 86,206,430.80 : x
  2. Step 2: Convert to fraction form
    280,295,390.80/420,368,436.60 = 86,206,430.80/x
  3. Step 3: Cross multiply
    280,295,390.80x = 420,368,436.60 × 86,206,430.80
  4. Step 4: Simplify right side
    280,295,390.80x = 36,238,462,540,262,088
  5. Step 5: Solve for x
    x = 36,238,462,540,262,088/280,295,390.80
  6. Step 6: Final answer
    x = 129,286,687.29

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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.