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Finding the Fourth Proportional to 85,656.84, 128,632.28 and 52,571.19

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Solution

The fourth proportional to 85,656.84, 128,632.28 and 52,571.19 is: 78,947.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,656.84 : 128,632.28 = 52,571.19 : x
  2. Step 2: Convert to fraction form
    85,656.84/128,632.28 = 52,571.19/x
  3. Step 3: Cross multiply
    85,656.84x = 128,632.28 × 52,571.19
  4. Step 4: Simplify right side
    85,656.84x = 6,762,351,769.16
  5. Step 5: Solve for x
    x = 6,762,351,769.16/85,656.84
  6. Step 6: Final answer
    x = 78,947.01

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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.