Home / 280,063,452.45-420,079,992.80-85,974,900.69

Finding the Fourth Proportional to 280,063,452.45, 420,079,992.80 and 85,974,900.69

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Solution

The fourth proportional to 280,063,452.45, 420,079,992.80 and 85,974,900.69 is: 128,957,689.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,063,452.45 : 420,079,992.80 = 85,974,900.69 : x
  2. Step 2: Convert to fraction form
    280,063,452.45/420,079,992.80 = 85,974,900.69/x
  3. Step 3: Cross multiply
    280,063,452.45x = 420,079,992.80 × 85,974,900.69
  4. Step 4: Simplify right side
    280,063,452.45x = 36,116,335,662,406,040
  5. Step 5: Solve for x
    x = 36,116,335,662,406,040/280,063,452.45
  6. Step 6: Final answer
    x = 128,957,689.22

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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.