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Finding the Fourth Proportional to 123,963.40, 185,945.10 and 115,409.80

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Solution

The fourth proportional to 123,963.40, 185,945.10 and 115,409.80 is: 173,114.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,963.40 : 185,945.10 = 115,409.80 : x
  2. Step 2: Convert to fraction form
    123,963.40/185,945.10 = 115,409.80/x
  3. Step 3: Cross multiply
    123,963.40x = 185,945.10 × 115,409.80
  4. Step 4: Simplify right side
    123,963.40x = 21,459,886,801.98
  5. Step 5: Solve for x
    x = 21,459,886,801.98/123,963.40
  6. Step 6: Final answer
    x = 173,114.70

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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.