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Finding the Fourth Proportional to 91,898,110.45, 128,980,205.04 and 91,898,110.45

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Solution

The fourth proportional to 91,898,110.45, 128,980,205.04 and 91,898,110.45 is: 128,980,205.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,898,110.45 : 128,980,205.04 = 91,898,110.45 : x
  2. Step 2: Convert to fraction form
    91,898,110.45/128,980,205.04 = 91,898,110.45/x
  3. Step 3: Cross multiply
    91,898,110.45x = 128,980,205.04 × 91,898,110.45
  4. Step 4: Simplify right side
    91,898,110.45x = 11,853,037,128,629,568
  5. Step 5: Solve for x
    x = 11,853,037,128,629,568/91,898,110.45
  6. Step 6: Final answer
    x = 128,980,205.04

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.