Home / 85,934,891.38-128,901,074.07-21,238,702

Finding the Fourth Proportional to 85,934,891.38, 128,901,074.07 and 21,238,702

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Solution

The fourth proportional to 85,934,891.38, 128,901,074.07 and 21,238,702 is: 31,857,740.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,934,891.38 : 128,901,074.07 = 21,238,702 : x
  2. Step 2: Convert to fraction form
    85,934,891.38/128,901,074.07 = 21,238,702/x
  3. Step 3: Cross multiply
    85,934,891.38x = 128,901,074.07 × 21,238,702
  4. Step 4: Simplify right side
    85,934,891.38x = 2,737,691,499,652,657
  5. Step 5: Solve for x
    x = 2,737,691,499,652,657/85,934,891.38
  6. Step 6: Final answer
    x = 31,857,740.85

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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.