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Finding the Fourth Proportional to 76,246.44, 105,128.58 and 65,617.80

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Solution

The fourth proportional to 76,246.44, 105,128.58 and 65,617.80 is: 90,473.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,246.44 : 105,128.58 = 65,617.80 : x
  2. Step 2: Convert to fraction form
    76,246.44/105,128.58 = 65,617.80/x
  3. Step 3: Cross multiply
    76,246.44x = 105,128.58 × 65,617.80
  4. Step 4: Simplify right side
    76,246.44x = 6,898,306,136.72
  5. Step 5: Solve for x
    x = 6,898,306,136.72/76,246.44
  6. Step 6: Final answer
    x = 90,473.81

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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.