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Finding the Fourth Proportional to 145,611.52, 200,903.68 and 81,945.60

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Solution

The fourth proportional to 145,611.52, 200,903.68 and 81,945.60 is: 113,062.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,611.52 : 200,903.68 = 81,945.60 : x
  2. Step 2: Convert to fraction form
    145,611.52/200,903.68 = 81,945.60/x
  3. Step 3: Cross multiply
    145,611.52x = 200,903.68 × 81,945.60
  4. Step 4: Simplify right side
    145,611.52x = 16,463,172,599.81
  5. Step 5: Solve for x
    x = 16,463,172,599.81/145,611.52
  6. Step 6: Final answer
    x = 113,062.29

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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.