Home / 85,848.20-128,772.30-82,567.70

Finding the Fourth Proportional to 85,848.20, 128,772.30 and 82,567.70

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Solution

The fourth proportional to 85,848.20, 128,772.30 and 82,567.70 is: 123,851.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,848.20 : 128,772.30 = 82,567.70 : x
  2. Step 2: Convert to fraction form
    85,848.20/128,772.30 = 82,567.70/x
  3. Step 3: Cross multiply
    85,848.20x = 128,772.30 × 82,567.70
  4. Step 4: Simplify right side
    85,848.20x = 10,632,432,634.71
  5. Step 5: Solve for x
    x = 10,632,432,634.71/85,848.20
  6. Step 6: Final answer
    x = 123,851.55

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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.