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Finding the Fourth Proportional to 123,513.70, 185,443.35 and 76,857.70

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Solution

The fourth proportional to 123,513.70, 185,443.35 and 76,857.70 is: 115,394.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,513.70 : 185,443.35 = 76,857.70 : x
  2. Step 2: Convert to fraction form
    123,513.70/185,443.35 = 76,857.70/x
  3. Step 3: Cross multiply
    123,513.70x = 185,443.35 × 76,857.70
  4. Step 4: Simplify right side
    123,513.70x = 14,252,749,361.30
  5. Step 5: Solve for x
    x = 14,252,749,361.30/123,513.70
  6. Step 6: Final answer
    x = 115,394.08

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1.5x scale

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.