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Finding the Fourth Proportional to 145,603.62, 200,917.44 and 81,940.32

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Solution

The fourth proportional to 145,603.62, 200,917.44 and 81,940.32 is: 113,068.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,603.62 : 200,917.44 = 81,940.32 : x
  2. Step 2: Convert to fraction form
    145,603.62/200,917.44 = 81,940.32/x
  3. Step 3: Cross multiply
    145,603.62x = 200,917.44 × 81,940.32
  4. Step 4: Simplify right side
    145,603.62x = 16,463,239,327.18
  5. Step 5: Solve for x
    x = 16,463,239,327.18/145,603.62
  6. Step 6: Final answer
    x = 113,068.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.