Home / 85,765,816.20-128,673,975.66-31,177,541.70

Finding the Fourth Proportional to 85,765,816.20, 128,673,975.66 and 31,177,541.70

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Solution

The fourth proportional to 85,765,816.20, 128,673,975.66 and 31,177,541.70 is: 46,775,491.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,765,816.20 : 128,673,975.66 = 31,177,541.70 : x
  2. Step 2: Convert to fraction form
    85,765,816.20/128,673,975.66 = 31,177,541.70/x
  3. Step 3: Cross multiply
    85,765,816.20x = 128,673,975.66 × 31,177,541.70
  4. Step 4: Simplify right side
    85,765,816.20x = 4,011,738,241,844,435
  5. Step 5: Solve for x
    x = 4,011,738,241,844,435/85,765,816.20
  6. Step 6: Final answer
    x = 46,775,491.91

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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.