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Finding the Fourth Proportional to 123,119.63, 170,045.21 and 82,763.40

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Solution

The fourth proportional to 123,119.63, 170,045.21 and 82,763.40 is: 114,307.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,119.63 : 170,045.21 = 82,763.40 : x
  2. Step 2: Convert to fraction form
    123,119.63/170,045.21 = 82,763.40/x
  3. Step 3: Cross multiply
    123,119.63x = 170,045.21 × 82,763.40
  4. Step 4: Simplify right side
    123,119.63x = 14,073,519,733.31
  5. Step 5: Solve for x
    x = 14,073,519,733.31/123,119.63
  6. Step 6: Final answer
    x = 114,307.68

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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.