Home / 85,404,607.80-128,106,911.70-81,224,230.20

Finding the Fourth Proportional to 85,404,607.80, 128,106,911.70 and 81,224,230.20

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Solution

The fourth proportional to 85,404,607.80, 128,106,911.70 and 81,224,230.20 is: 121,836,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,404,607.80 : 128,106,911.70 = 81,224,230.20 : x
  2. Step 2: Convert to fraction form
    85,404,607.80/128,106,911.70 = 81,224,230.20/x
  3. Step 3: Cross multiply
    85,404,607.80x = 128,106,911.70 × 81,224,230.20
  4. Step 4: Simplify right side
    85,404,607.80x = 10,405,385,286,131,874
  5. Step 5: Solve for x
    x = 10,405,385,286,131,874/85,404,607.80
  6. Step 6: Final answer
    x = 121,836,345.30

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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.