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Finding the Fourth Proportional to 90,603.61, 135,845.42 and 43,226.01

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Solution

The fourth proportional to 90,603.61, 135,845.42 and 43,226.01 is: 64,810.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,603.61 : 135,845.42 = 43,226.01 : x
  2. Step 2: Convert to fraction form
    90,603.61/135,845.42 = 43,226.01/x
  3. Step 3: Cross multiply
    90,603.61x = 135,845.42 × 43,226.01
  4. Step 4: Simplify right side
    90,603.61x = 5,872,055,483.37
  5. Step 5: Solve for x
    x = 5,872,055,483.37/90,603.61
  6. Step 6: Final answer
    x = 64,810.39

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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.