Home / 85,543,643.20-128,315,464.80-51,531,419.20

Finding the Fourth Proportional to 85,543,643.20, 128,315,464.80 and 51,531,419.20

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Solution

The fourth proportional to 85,543,643.20, 128,315,464.80 and 51,531,419.20 is: 77,297,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,543,643.20 : 128,315,464.80 = 51,531,419.20 : x
  2. Step 2: Convert to fraction form
    85,543,643.20/128,315,464.80 = 51,531,419.20/x
  3. Step 3: Cross multiply
    85,543,643.20x = 128,315,464.80 × 51,531,419.20
  4. Step 4: Simplify right side
    85,543,643.20x = 6,612,278,006,451,644
  5. Step 5: Solve for x
    x = 6,612,278,006,451,644/85,543,643.20
  6. Step 6: Final answer
    x = 77,297,128.80

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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.