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Finding the Fourth Proportional to 123,963.40, 185,945.10 and 79,640.20

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Solution

The fourth proportional to 123,963.40, 185,945.10 and 79,640.20 is: 119,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,963.40 : 185,945.10 = 79,640.20 : x
  2. Step 2: Convert to fraction form
    123,963.40/185,945.10 = 79,640.20/x
  3. Step 3: Cross multiply
    123,963.40x = 185,945.10 × 79,640.20
  4. Step 4: Simplify right side
    123,963.40x = 14,808,704,953.02
  5. Step 5: Solve for x
    x = 14,808,704,953.02/123,963.40
  6. Step 6: Final answer
    x = 119,460.30

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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.