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Finding the Fourth Proportional to 123,339.70, 170,208.80 and 66,751.08

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Solution

The fourth proportional to 123,339.70, 170,208.80 and 66,751.08 is: 92,116.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,339.70 : 170,208.80 = 66,751.08 : x
  2. Step 2: Convert to fraction form
    123,339.70/170,208.80 = 66,751.08/x
  3. Step 3: Cross multiply
    123,339.70x = 170,208.80 × 66,751.08
  4. Step 4: Simplify right side
    123,339.70x = 11,361,621,225.50
  5. Step 5: Solve for x
    x = 11,361,621,225.50/123,339.70
  6. Step 6: Final answer
    x = 92,116.50

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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.