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Finding the Fourth Proportional to 91,980.75, 126,768.10 and 68,065.91

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Solution

The fourth proportional to 91,980.75, 126,768.10 and 68,065.91 is: 93,808.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,980.75 : 126,768.10 = 68,065.91 : x
  2. Step 2: Convert to fraction form
    91,980.75/126,768.10 = 68,065.91/x
  3. Step 3: Cross multiply
    91,980.75x = 126,768.10 × 68,065.91
  4. Step 4: Simplify right side
    91,980.75x = 8,628,586,085.47
  5. Step 5: Solve for x
    x = 8,628,586,085.47/91,980.75
  6. Step 6: Final answer
    x = 93,808.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.