Home / 85,343,465.81-128,015,530.83-20,647,167.06

Finding the Fourth Proportional to 85,343,465.81, 128,015,530.83 and 20,647,167.06

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Solution

The fourth proportional to 85,343,465.81, 128,015,530.83 and 20,647,167.06 is: 30,970,830.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,343,465.81 : 128,015,530.83 = 20,647,167.06 : x
  2. Step 2: Convert to fraction form
    85,343,465.81/128,015,530.83 = 20,647,167.06/x
  3. Step 3: Cross multiply
    85,343,465.81x = 128,015,530.83 × 20,647,167.06
  4. Step 4: Simplify right side
    85,343,465.81x = 2,643,158,051,321,590.50
  5. Step 5: Solve for x
    x = 2,643,158,051,321,590.50/85,343,465.81
  6. Step 6: Final answer
    x = 30,970,830.94

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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.