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Finding the Fourth Proportional to 85,356.41, 128,200.59 and 69,573.02

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Solution

The fourth proportional to 85,356.41, 128,200.59 and 69,573.02 is: 104,494.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,356.41 : 128,200.59 = 69,573.02 : x
  2. Step 2: Convert to fraction form
    85,356.41/128,200.59 = 69,573.02/x
  3. Step 3: Cross multiply
    85,356.41x = 128,200.59 × 69,573.02
  4. Step 4: Simplify right side
    85,356.41x = 8,919,301,571.08
  5. Step 5: Solve for x
    x = 8,919,301,571.08/85,356.41
  6. Step 6: Final answer
    x = 104,494.81

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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.