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Finding the Fourth Proportional to 123,339.81, 170,209.35 and 66,751.19

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Solution

The fourth proportional to 123,339.81, 170,209.35 and 66,751.19 is: 92,116.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,339.81 : 170,209.35 = 66,751.19 : x
  2. Step 2: Convert to fraction form
    123,339.81/170,209.35 = 66,751.19/x
  3. Step 3: Cross multiply
    123,339.81x = 170,209.35 × 66,751.19
  4. Step 4: Simplify right side
    123,339.81x = 11,361,676,448.86
  5. Step 5: Solve for x
    x = 11,361,676,448.86/123,339.81
  6. Step 6: Final answer
    x = 92,116.86

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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.