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Finding the Fourth Proportional to 89,208.80, 133,659.60 and 42,360.80

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Solution

The fourth proportional to 89,208.80, 133,659.60 and 42,360.80 is: 63,468.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,208.80 : 133,659.60 = 42,360.80 : x
  2. Step 2: Convert to fraction form
    89,208.80/133,659.60 = 42,360.80/x
  3. Step 3: Cross multiply
    89,208.80x = 133,659.60 × 42,360.80
  4. Step 4: Simplify right side
    89,208.80x = 5,661,927,583.68
  5. Step 5: Solve for x
    x = 5,661,927,583.68/89,208.80
  6. Step 6: Final answer
    x = 63,468.26

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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.