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Finding the Fourth Proportional to 84,007.30, 126,010.95 and 76,231.30

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Solution

The fourth proportional to 84,007.30, 126,010.95 and 76,231.30 is: 114,346.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,007.30 : 126,010.95 = 76,231.30 : x
  2. Step 2: Convert to fraction form
    84,007.30/126,010.95 = 76,231.30/x
  3. Step 3: Cross multiply
    84,007.30x = 126,010.95 × 76,231.30
  4. Step 4: Simplify right side
    84,007.30x = 9,605,978,532.74
  5. Step 5: Solve for x
    x = 9,605,978,532.74/84,007.30
  6. Step 6: Final answer
    x = 114,346.95

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1.5x scale

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.