Home / 285,631.75-428,361.15-85,899.11

Finding the Fourth Proportional to 285,631.75, 428,361.15 and 85,899.11

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Solution

The fourth proportional to 285,631.75, 428,361.15 and 85,899.11 is: 128,822.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,631.75 : 428,361.15 = 85,899.11 : x
  2. Step 2: Convert to fraction form
    285,631.75/428,361.15 = 85,899.11/x
  3. Step 3: Cross multiply
    285,631.75x = 428,361.15 × 85,899.11
  4. Step 4: Simplify right side
    285,631.75x = 36,795,841,543.58
  5. Step 5: Solve for x
    x = 36,795,841,543.58/285,631.75
  6. Step 6: Final answer
    x = 128,822.66

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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.