Home / 85,942.20-128,940.65-54,547.82

Finding the Fourth Proportional to 85,942.20, 128,940.65 and 54,547.82

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Solution

The fourth proportional to 85,942.20, 128,940.65 and 54,547.82 is: 81,839.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,942.20 : 128,940.65 = 54,547.82 : x
  2. Step 2: Convert to fraction form
    85,942.20/128,940.65 = 54,547.82/x
  3. Step 3: Cross multiply
    85,942.20x = 128,940.65 × 54,547.82
  4. Step 4: Simplify right side
    85,942.20x = 7,033,430,449.44
  5. Step 5: Solve for x
    x = 7,033,430,449.44/85,942.20
  6. Step 6: Final answer
    x = 81,839.08

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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.