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Finding the Fourth Proportional to 85,812.48, 128,713.59 and 50,973.84

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Solution

The fourth proportional to 85,812.48, 128,713.59 and 50,973.84 is: 76,457.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,812.48 : 128,713.59 = 50,973.84 : x
  2. Step 2: Convert to fraction form
    85,812.48/128,713.59 = 50,973.84/x
  3. Step 3: Cross multiply
    85,812.48x = 128,713.59 × 50,973.84
  4. Step 4: Simplify right side
    85,812.48x = 6,561,025,942.49
  5. Step 5: Solve for x
    x = 6,561,025,942.49/85,812.48
  6. Step 6: Final answer
    x = 76,457.71

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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.