Home / 428,469,763.68-642,699,046.80-105,356,435.04

Finding the Fourth Proportional to 428,469,763.68, 642,699,046.80 and 105,356,435.04

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Solution

The fourth proportional to 428,469,763.68, 642,699,046.80 and 105,356,435.04 is: 158,033,275.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,469,763.68 : 642,699,046.80 = 105,356,435.04 : x
  2. Step 2: Convert to fraction form
    428,469,763.68/642,699,046.80 = 105,356,435.04/x
  3. Step 3: Cross multiply
    428,469,763.68x = 642,699,046.80 × 105,356,435.04
  4. Step 4: Simplify right side
    428,469,763.68x = 67,712,480,374,454,120
  5. Step 5: Solve for x
    x = 67,712,480,374,454,120/428,469,763.68
  6. Step 6: Final answer
    x = 158,033,275.89

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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.